BUG: Login As (user impersonation) not working with subfolders

[so-grimm]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When working in a Neos installation in a subfolder, the user impersonation functionality doesn't work and I get an error saying "Could not switch to the selected user." In Neos installations without subfolder, it's working fine.

Expected Behavior

It should always be possible to switch users, regardless of using subfolders or not.

Steps To Reproduce

1. use a Neos installation in a subfolder (e.g. www.myproject.com/subfolder/neos)
2. go to User Management
3. click on the crossed arrows at the very end of the table row for any user

Environment

- Flow: 8.0 (?)
- Neos: 8.0
- PHP:

Anything else?

No response

[dlubitz]

Maybe this static location here is causing this:
https://github.com/neos/neos-development-collection/pull/3648/files#diff-dcd63ecf706315f7e80ff36392ab0f6995243cec061273247ede46454a7a7e92R82

[so-grimm]

Yeah, it is. There was a PR to fix this (sorry, forgot to add that in the report), but it was never merged: https://github.com/Unikka/login-as/pull/16/files
But I'm not quite happy with that fix and I think there has to be a better one. I'll look into it as soon as I have the time, but I figured it would be a good idea to create an issue for it already, so I don't forget (and in case someone else wants to fix it).

[kitsunet]

Given that this script is included in pretty much all backend modules I guess we have to generate the correct url in the generic Module/Index.html template in Neos.Neos and then grab it from the markup in this script.

[so-grimm]

So far I haven't encountered any problems with other backend modules, though 🤔 I can do some more testing, but everything else seems to be working fine.

[ahaeslich]

So far I haven't encountered any problems with other backend modules, though 🤔 I can do some more testing, but everything else seems to be working fine.

Well there is another issue in the UI which is not that breaking: neos/neos-ui#3712