I was experiencing exactly this for months. I was not able to setup and/or install some apps, always crashing.
I was going mad with it. As an iOS software developer, I know how difficult it is an app to crash nowadays.
I was wondering why no-one else were mentioning this issues. Was this a “just me” problem?
Then, I decided to delete the app and install again.
It solved the issues.
My gut feeling is that somehow I ended up having inconsistent or corrupted data somewhere (local db, filesystem, some kind of cache) meaning syncing was not working properly. Delete and install again wipes out the local storage.