Clone Repo via AbapGit: HTTP Error 35

[HuprichT]

I recently set up the ABAPGITSERVER (service) and tried to clone a Test Repo.

The Error occurs here:

So I am not very experienced with Basis Topics (which is clearly indicated by the fact that I created this issue), but I have made the following observations:

• SSL is setup based on Instruction in abapGit Readme
• Test Connection via Z_ABAPGIT_TEST_SSL is successfull for github.com and api.github.com
• Adding Logon Data to Service ZABAPGITSERVER like in SSL setup? #27 did not work
• Commands clone/push/pull via Git Bash for this specific ABAPGITSERVER Repository works like a Charme
• Reaching the Webservice in General (like creating the Repo initial) works too
• Changing Secrurity Requirement in Service with Logon Credentials from Standard to SSL leads to a 403 - Forbidden

Has anyone got a hint for me to resolve this?