Thanks for the reply, I just finished trying to reset the settings to default in the game types tab and then went to clear stats>build stats. Unfortunately, I still have the same issue when attempting to rebuild my stats. I also tried to fix the issue by using a smaller database with 3 million hands, but this also didn't seem to solve the problem. Is there anything else I can try to fix that might fix this issue?
You made a mistake in the stat name 1st raise BTN. The correct name for this stat is 1st Raise BTN. Therefore the correct Expression string looks like this:
Value(4bet BTN vs BB,SB)*Value(1st Raise BTN)/100