'Pull Request Feature' error

[chris-ace]

I receive following error trying to finish a feature via PR ("Pull Request Feature" action):

System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified
   at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
   at GitFlowAVH.GitFlowWrapper.RunAzRepos(String arguments, Int32 timeout)
   at GitFlowAVH.GitFlowWrapper.PullRequestFeature(String featureName, String pullRequestWorkItems, Boolean deleteLocalBranch)
   at GitFlowAVH.ViewModels.ActionViewModel.PullRequestFeature()

The last log in the GitFlow AVH output is as follows:
Running az repos pr create --source-branch feature/#### --target-branch develop --title "Feature #### into develop" --open --work-items ####

I installed the Azure CLI and the azure-devops extension, logged in via az login. Running the exact same command via CLI successfully creates a PR and opens it in a web browser window.

I updated to 3.0.1.2 today, but the error persists. I do not remember which version I had before but it was the same error.