When using the Windows Credential Manager for Authentication to a vanilla Git server in the office, sometimes SourceTree will forget to use those credentials.

We get the error attached when trying to push and pull from repositories.

Typing in "git config --get --global credential.helper" to the terminal (built into ST) gives us nothing.

We then have to re-set the credential helper using "git config --global credential.helper wincred".

Typing in "git config --get --global credential.helper" then gives us "wincred" as the correct response.

At this point we can successfully Push/Pull/Fetch from repositories.