I know, this is going to sound nooby so please don't hate, but how the heck do you rate an submission lmao
The fact that it's ranked doesn't matter
Clicker Jam Spring 2023 was ranked AND had voting
I've never hosted a jam so I wouldn't know, but I looked at the help page and the one setting that seems like a pitfall is the ranking criteria, because it seems like if you don't set any it would not be possible to vote. Did you set the criteria?