The Status screen says the blocker is enabled, but did not load correctly!

There are two main reasons that the blocker did not load:

1. The blocker is disabled. Check your Phone settings and enable Simple Call Blocker there.

2. There are too many numbers in the block list. Reduce its size by removing entries or making the blocked number ranges narrower. There is a limit to how many numbers can be blocked with a “Call Directory app extension”, but that limit is not documented anywhere.