reqhistoricadata endDateTime issue

Has anyone else run into this recently? Basically if I pass an empty string to reqhistoricaldata for endDateTime I get that I am supposed to pass a date string. But then if I do that it says you have to use an empty string if you want historical updates, which I do.

I have asked IB; they seem to think nothing changed on their end but then my python code also does this. At this point I do not knonw what is going on or where the bug is in my code. I have reinstalled this package and tried many different things.