Authentiaction failed with Personal Access Token

[smn_ksng]

Hello everyone,

In Sourcetree, I'm trying to add an account at the Remote repositories. In the window that says 'Edit Hosting Account', I choose GitLab as Hosting Service and HTTPS. 

In LrzGitlab, I create a personal access token which I use as password in the 'Sourcetree personal access token request' window that pops up, along with my username. It then always says 'Authentication failed'. 

My coworker always uses GitLab as Hosting Service, even though the PAT was created in LrzGitLab, but that doesn't work for me apparently. I hope someone has experience with LrzGitLab or that sort of problem in general. Any idea would be much appreciated.