Hi Stefan,
Posting on a 2 year old topic is not encouraged (also ominously called necroposting). Additionally, it’s not easy for people to help you if you only supply them with a link to a repo expecting them to figure out the problem on their own.
Instead, it’s best practice to start a new topic where you explain exactly what you tried and what went wrong. In fact, to get the best help possible, please follow these excellent suggestions as closely as you can.