Mottecraft

Maybe I should have given the Test Conditions.
I used a marker for every Attribute except the ones that are player specific like level or gamemode.
I always made sure the test conditions are true at least once, means if I searched for an entity within a 0.2 block distance I made sure it is within a 0.2 block distance, so it wouldn't make that much sence if it doesn't depend on the selector.

It's at least possible that my specific test conditions revealed another unrelated Bug

I also encountered this problem and I did a little bit of testing.

The problem comes when you want to use something else than @s or a playername for the target that is used for the score
You always get an error if you try to search for an entity in a distance of less than 2 blocks, does not matter if you use =1 or =..1
You always get an error if you use the level attribute
You get the error when you use the team=# attribute
I think you get the error if you use the x=#, dx=# and the x_rotation=#, attribute
That were all cases where I got the error. I hope that helps a little bit