SourceTree does not start (as.atlassian.com)

Since a few days SourceTrees does not start up anymore. I even reinstalled it but it still does not start.

I will attach the log file from a start up, but I guess the important lines are the following:

ERROR [2022-01-16 18:40:47,379] [1] [SourceTree.Model.Repository] [Log] - Repository: [] does not exist
ERROR [2022-01-16 18:40:47,395] [1] [SourceTree.Model.Repository] [Log] - Repository: [] does not exist
ERROR [2022-01-16 18:40:47,410] [1] [SourceTree.Model.Repository] [Log] - Repository: [] does not exist
ERROR [2022-01-16 18:40:49,713] [PriorityScheduler: 0] [SourceTree.Analytics.Services.AnalyticsService] [Log] - POST Interaction submission FAILED
System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: Der Remotename konnte nicht aufgel�st werden: 'as.atlassian.com'
   bei System.Net.HttpWebRequest.EndGetRequestStream(IAsyncResult asyncResult, TransportContext& context)
   bei System.Net.Http.HttpClientHandler.GetRequestStreamCallback(IAsyncResult ar)
   --- Ende der internen Ausnahmestapel�berwachung —

It does not find the server 'as.atlassian.com' and indeed I can not access via ping.