Provider for Git Integration does not work

Hello community,

we use SpiraTeam v6.1.0.1. After downloading the Git plug-in (Provider for Git Integration) we have executed the steps in the given manual (https://spiradoc.inflectra.com/Version-Control-Integration/Integrating-with-Git/). We have tested the connection in the scope Version Control Integration.

It was displayed that the connection works  with our GitLab repository. 

Unfortunately, if we navigated to  the tab Artifacts -> Source Code in SpiraTeam, we obtain the following message:

• Invalid Operation: The source code repository browser is currently initializing. Please refresh the page and try again.
•  The setup was already checked and we haven’t found noticable problems.

Do you have any idea to solve our problem? Is is possible that this error message coheres with our proxy-server?

Thanking you in anticipation.