Oh wow, that was fast! And sorry I didn't get back sooner, I just saw your reply.
In case you still need the info:
I'm on a Samsung Galaxy Tab A with LineageOS.
I was trying to open Moon+ Reader, but the problem persists if I clear the default apps (as I said, nothing happens, the app selection dialog isn't even shown).
And I can't email a crash log, because that seems to be affected, too. A toast message comes up saying "Your device says it cannot send email!"
And thanks for all your work! CC is one of my most useful and most used apps
.