Trying to restore from TimeMachine - stuck on "loading backup"
I am trying to restore a 2018 13" MacBook Pro from 1 of my TimeMachine Backups I did for my "Workbook" (2018 15" MacBook which I just left yesterday at the apple store as it has the infamous keyboard issue).
In the migration assistant it is just stuck on "loading backup" (using a wired network connection!); just left it overnight, didn't make a difference (so I stopped after >9h)
The disappointing/worrying thing - I actually have 2 TimeMachine devices (1 TimeCapsule 2 TB and my QNap NAS) with 2 backups, none of which is working and giving the same bahavior.
TimeCapsule was restarted, as was the MacBook. The Backup was done using Mojave as is the version of the 13" Mac where I am trying to restore to (haven't updated as I still need some old software not supported by Catalina!)
Any ideas what I could try? (having 2 backups and none working is really disappointing and not what I was expecting :/). Copy the *.sparsebundle file to a big USB hard disk and attach directly? Does this work and is recognised as a TimeMachine source where I could restore from?