DickyDutch I saw a couple of crash logs. From the comments in Testflight I believe these are from you (the comments says it crashed when starting to play). And there are a couple of crashes happening on the phone.
All crashes on the phone are caused by the logging messages. Somehow your phone crashes when writing the log which I can't explain. The logging code should not crash. So I am currently a bit blank about what was causing this.
Regarding the other crash, the cause is that somehow changes pushed from the cloud to your device delete data you are currently accessing. That means the app suddenly can no longer work with a song that existed just a moment ago. This is a general problem now that data can be changed basically at any time. Imagine you are editing audio regions on one device while deleting that song on another device. I need to investigate how this conflict should be resolved with iCloud.
Damir delete all iCloud as I don’t want to merge files I want a clean new iCloud
That's not possible. You can only delete the iCloud contents from a device that is already synced to iCloud. But that means all data in iCloud and all devices synced will be deleted. This happens for example when restoring a backup while iCloud sync is enabled.
If you try to delete the contents of iCloud from a device that has not yet joined iCloud, The other connected devices will assume an error in the iCloud backend and reupload all their local contant. I was not able to prevent this behavior.
But I am also not happy about these options. In my opinion there should be no option at all. But I am not sure how to achieve that.