Hello,
I am trying to pass in some parameter variables into an otree player model from my study's particpant URL link as follows: 

https://study-name.herokuapp.com/room/a?participant_label=null_hitId=36KM3FWE3SHK6S6OUDHWBB6USZ707_workerId=TP_1X6OV9B5T84SKY_assignmentId=30H4UDGLT4N81WFP564CYE0HX5UPM

However I am getting an error that "participant_label is too long or malformed" (the code works with shorter parameter values). What is the size limit for the participant label variable, and is there a way to increase it? I can't make the parameter values shorter, unfortunately.

Thanks in advance