That's strange. I can't recreate the Apollo error in my own workspace.
An idea I just had -> maybe try using the Description output from Apollo in a new Formula column. No need to do anything, just get the Description output from Apollo and put it in a new column.
Afterwards try doing the empty column condition but this time using the formula column?
I have no clue if this makes sense or if it's going to work but I think it's worth trying