diff --git a/src/custom/components/Header/NetworkSelector/NetworkSelectorMod.tsx b/src/custom/components/Header/NetworkSelector/NetworkSelectorMod.tsx
index 4a8b386959..5f93d878e0 100644
--- a/src/custom/components/Header/NetworkSelector/NetworkSelectorMod.tsx
+++ b/src/custom/components/Header/NetworkSelector/NetworkSelectorMod.tsx
@@ -11,7 +11,7 @@ import { ChevronDown } from 'react-feather'
 // import { useHistory } from 'react-router-dom'
 // import { useModalOpen, useToggleModal } from 'state/application/hooks'
 // import { addPopup, ApplicationModal } from 'state/application/reducer'
-import styled from 'styled-components/macro'
+import styled, { css } from 'styled-components/macro'
 import { ExternalLink, MEDIA_WIDTHS } from 'theme'
 // import { replaceURLParam } from 'utils/routes'
 // import { useAppDispatch } from 'state/hooks'
@@ -25,6 +25,10 @@ import {
 } from '@src/components/Header/NetworkSelector'
 import useChangeNetworks, { ChainSwitchCallbackOptions } from 'hooks/useChangeNetworks'
 import { transparentize } from 'polished'
+// mod
+import { UnsupportedChainIdError, useWeb3React } from 'web3-react-core'
+import { useAddPopup, useRemovePopup } from 'state/application/hooks'
+import { useEffect } from 'react'
 import { getExplorerBaseUrl } from 'utils/explorer'
 
 /* const ActiveRowLinkList = styled.div`
@@ -288,6 +292,42 @@ export default function NetworkSelector() {
   // mod: refactored inner logic into useChangeNetworks hook
   const { node, open, toggle, info, handleChainSwitch } = useChangeNetworks({ account, chainId, library })
 
+  // mod: add error and isUnsupportedNetwork const and useEffect
+  const { error } = useWeb3React()
+  const isUnsupportedNetwork = error instanceof UnsupportedChainIdError
+  const addPopup = useAddPopup()
+  const removePopup = useRemovePopup()
+
+  useEffect(() => {
+    const POPUP_KEY = chainId?.toString()
+
+    if (POPUP_KEY && isUnsupportedNetwork) {
+      addPopup(
+        {
+          failedSwitchNetwork: chainId as SupportedChainId,
+          unsupportedNetwork: true,
+          styles: css`
+            background: ${({ theme }) => theme.yellow3};
+            &&& {
+              margin-top: 20px;
+              ${({ theme }) => theme.mediaWidth.upToSmall`
+                margin-top: 40px;
+              `}
+            }
+          `,
+        },
+        // ID
+        POPUP_KEY,
+        // null to disable auto hide
+        null
+      )
+    }
+
+    return () => {
+      POPUP_KEY && removePopup(POPUP_KEY)
+    }
+  }, [addPopup, chainId, isUnsupportedNetwork, removePopup])
+
   /* const parsedQs = useParsedQueryString()
   const { urlChain, urlChainId } = getParsedChainId(parsedQs)
   const prevChainId = usePrevious(chainId)
@@ -352,7 +392,7 @@ export default function NetworkSelector() {
     }
   }, [chainId, history, urlChainId, urlChain]) */
 
-  if (!chainId || !info || !library) {
+  if (!chainId || !info || !library || isUnsupportedNetwork) {
     return null
   }
 
diff --git a/src/custom/components/Popups/FailedNetworkSwitchPopupMod.tsx b/src/custom/components/Popups/FailedNetworkSwitchPopupMod.tsx
index e620e0b91e..94eb645b18 100644
--- a/src/custom/components/Popups/FailedNetworkSwitchPopupMod.tsx
+++ b/src/custom/components/Popups/FailedNetworkSwitchPopupMod.tsx
@@ -13,20 +13,27 @@ const RowNoFlex = styled(AutoRow)`
   flex-wrap: nowrap;
 `
 
-export default function FailedNetworkSwitchPopup({ chainId }: { chainId: SupportedChainId }) {
+export default function FailedNetworkSwitchPopup({
+  chainId,
+  isUnsupportedNetwork = false,
+}: {
+  chainId: SupportedChainId
+  isUnsupportedNetwork?: boolean
+}) {
   const chainInfo = CHAIN_INFO[chainId]
   const theme = useContext(ThemeContext)
 
   return (
     <RowNoFlex>
       <div style={{ paddingRight: 16 }}>
-        <AlertCircle color={theme.red1} size={24} />
+        <AlertCircle color={isUnsupportedNetwork ? theme.red3 : theme.red1} size={24} />
       </div>
       <AutoColumn gap="8px">
-        <ThemedText.Body fontWeight={500}>
+        <ThemedText.Body fontWeight={500} color={isUnsupportedNetwork ? theme.text2 : 'initial'}>
           <Trans>
-            Failed to switch networks from the CowSwap Interface. In order to use CowSwap on {chainInfo.label}, you must
-            change the network in your wallet.
+            {isUnsupportedNetwork
+              ? `Please connect your wallet to one of the supported networks: Ethereum Mainnet or Gnosis Chain.`
+              : `Failed to switch networks from the CowSwap Interface. In order to use CowSwap on ${chainInfo.label}, you must change the network in your wallet.`}
           </Trans>
         </ThemedText.Body>
       </AutoColumn>
diff --git a/src/custom/components/Popups/PopupItem.tsx b/src/custom/components/Popups/PopupItem.tsx
index d7720e0410..6516388e69 100644
--- a/src/custom/components/Popups/PopupItem.tsx
+++ b/src/custom/components/Popups/PopupItem.tsx
@@ -1,6 +1,6 @@
 import styled from 'styled-components/macro'
 import { PopupContent } from 'state/application/reducer'
-import { default as PopupItemUni, Popup, Fader, StyledClose } from './PopupItemMod'
+import { default as PopupItemUni, Popup, Fader } from './PopupItemMod'
 
 const Wrapper = styled.div`
   ${Popup} {
@@ -15,10 +15,6 @@ const Wrapper = styled.div`
     height: 4px;
   }
 
-  ${StyledClose} {
-    stroke: ${({ theme }) => theme.text1};
-  }
-
   a {
     text-decoration: underline;
     color: ${({ theme }) => theme.textLink};
diff --git a/src/custom/components/Popups/PopupItemMod.tsx b/src/custom/components/Popups/PopupItemMod.tsx
index 4e763361de..552aa04c29 100644
--- a/src/custom/components/Popups/PopupItemMod.tsx
+++ b/src/custom/components/Popups/PopupItemMod.tsx
@@ -2,7 +2,7 @@ import { useCallback, useContext, useEffect } from 'react'
 import { X } from 'react-feather'
 import { animated } from 'react-spring'
 import { useSpring } from 'react-spring/web'
-import styled, { ThemeContext } from 'styled-components/macro'
+import styled, { FlattenInterpolation, ThemeContext, ThemeProps, DefaultTheme } from 'styled-components/macro'
 
 import { useRemovePopup } from 'state/application/hooks'
 import { PopupContent } from 'state/application/reducer'
@@ -21,7 +21,7 @@ export const StyledClose = styled(X)`
     cursor: pointer;
   }
 `
-export const Popup = styled.div`
+export const Popup = styled.div<{ css?: FlattenInterpolation<ThemeProps<DefaultTheme>> }>`
   display: inline-block;
   width: 100%;
   //padding: 1em;
@@ -38,6 +38,8 @@ export const Popup = styled.div`
       margin-right: 20px;
     }
   `}
+
+  ${({ css }) => css && css}
 `
 export const Fader = styled.div`
   position: absolute;
@@ -77,22 +79,30 @@ export default function PopupItem({
 
   const theme = useContext(ThemeContext)
 
+  // mod
+  const isTxn = 'txn' in content
+  const isListUpdate = 'listUpdate' in content
+  const isUnsupportedNetwork = 'unsupportedNetwork' in content
+  const isMetaTxn = 'metatxn' in content
+
   let popupContent
-  if ('txn' in content) {
+  if (isTxn) {
     const {
       txn: { hash, success, summary },
     } = content
     popupContent = <TransactionPopup hash={hash} success={success} summary={summary} />
-  } else if ('listUpdate' in content) {
+  } else if (isListUpdate) {
     const {
       listUpdate: { listUrl, oldList, newList, auto },
     } = content
     popupContent = <ListUpdatePopup popKey={popKey} listUrl={listUrl} oldList={oldList} newList={newList} auto={auto} />
-  } else if ('metatxn' in content) {
+  } else if (isMetaTxn) {
     const {
       metatxn: { id, success, summary },
     } = content
     popupContent = <TransactionPopup hash={id} success={success} summary={summary} />
+  } else if (isUnsupportedNetwork) {
+    popupContent = <FailedNetworkSwitchPopup chainId={content.failedSwitchNetwork} isUnsupportedNetwork />
   } else if ('failedSwitchNetwork' in content) {
     popupContent = <FailedNetworkSwitchPopup chainId={content.failedSwitchNetwork} />
   }
@@ -104,8 +114,8 @@ export default function PopupItem({
   })
 
   return (
-    <Popup className={className}>
-      <StyledClose color={theme.text2} onClick={removeThisPopup} />
+    <Popup className={className} css={content.styles}>
+      <StyledClose stroke={isUnsupportedNetwork ? theme.black : theme.text2} onClick={removeThisPopup} />
       {popupContent}
       {removeAfterMs !== null ? <AnimatedFader style={faderStyle} /> : null}
     </Popup>
diff --git a/src/custom/components/WalletModal/WalletModalMod.tsx b/src/custom/components/WalletModal/WalletModalMod.tsx
index f63288d945..f6ce1ce980 100644
--- a/src/custom/components/WalletModal/WalletModalMod.tsx
+++ b/src/custom/components/WalletModal/WalletModalMod.tsx
@@ -349,7 +349,10 @@ export default function WalletModal({
           <ContentWrapper>
             {error instanceof UnsupportedChainIdError ? (
               <h5>
-                <Trans>Please connect to a supported network in the dropdown menu or in your wallet.</Trans>
+                <Trans>
+                  App/wallet network mismatch. Please connect to a supported network in your wallet: Ethereum Mainnet or
+                  Gnosis Chain.
+                </Trans>
               </h5>
             ) : (
               <Trans>Error connecting. Try refreshing the page.</Trans>
diff --git a/src/custom/state/application/hooks.ts b/src/custom/state/application/hooks.ts
index 2bb60aae3d..936eee9395 100644
--- a/src/custom/state/application/hooks.ts
+++ b/src/custom/state/application/hooks.ts
@@ -1,7 +1,8 @@
 import { createAction } from '@reduxjs/toolkit'
+import { DEFAULT_TXN_DISMISS_MS } from '@src/constants/misc'
 import { useToggleModal } from '@src/state/application/hooks'
 import { useCallback } from 'react'
-import { ApplicationModal } from 'state/application/reducer'
+import { addPopup, ApplicationModal, PopupContent } from 'state/application/reducer'
 import { useAppDispatch } from 'state/hooks'
 
 export * from '@src/state/application/hooks'
@@ -22,3 +23,22 @@ export function useCloseModals(): () => void {
   const dispatch = useAppDispatch()
   return useCallback(() => dispatch(setOpenModal(null)), [dispatch])
 }
+
+// mod: add removeAfterMs change
+// returns a function that allows adding a popup
+export function useAddPopup(): (content: PopupContent, key?: string, removeAfterMs?: number | null) => void {
+  const dispatch = useAppDispatch()
+
+  return useCallback(
+    (content: PopupContent, key?: string, removeAfterMs?: number | null) => {
+      dispatch(
+        addPopup({
+          content,
+          key,
+          removeAfterMs: removeAfterMs === null ? null : removeAfterMs ?? DEFAULT_TXN_DISMISS_MS,
+        })
+      )
+    },
+    [dispatch]
+  )
+}
diff --git a/src/state/application/reducer.ts b/src/state/application/reducer.ts
index 491cb7c1e8..5d91a9af13 100644
--- a/src/state/application/reducer.ts
+++ b/src/state/application/reducer.ts
@@ -2,6 +2,7 @@ import { createSlice, nanoid } from '@reduxjs/toolkit'
 import { DEFAULT_TXN_DISMISS_MS } from 'constants/misc'
 
 import { SupportedChainId } from 'constants/chains'
+import { FlattenInterpolation, ThemeProps, DefaultTheme } from 'styled-components/macro' // mod
 
 type BasePopupContent =
   //   | {
@@ -12,10 +13,15 @@ type BasePopupContent =
   //   | {
   {
     failedSwitchNetwork: SupportedChainId
+    // mod: unsupported network
+    unsupportedNetwork?: boolean
   }
 
 // MOD: Modified PopupContent. The mod happened directly in the src file, to avoid redefining the state/hoos/etc
-export type PopupContent = TxPopupContent | MetaTxPopupContent | BasePopupContent
+export type PopupContent = (TxPopupContent | MetaTxPopupContent | BasePopupContent) & {
+  // mod: custom styles
+  styles?: FlattenInterpolation<ThemeProps<DefaultTheme>>
+}
 
 export type TxPopupContent = {
   txn: {