We host our instance of YouTrack and its URL has the format https://mydomain.com/youtrack/issues. However, it seems Testiny is exclusively expecting the format https://mydomain.com/issues, since we are getting this error whey trying the integration: URL needs to match the form https://((instance))/issues.
Hi, currently there is no way around it, but we will relax the schema for the YouTrack URLs with the next service release. So this should be fixed in a couple of days