Thank you for reaching out for assistance through the Community! Would you provide which PowerSchool product you are having trouble with, please?
I am having the exact same problem. Here is the web address on the registration form I'm trying to submit.
It sounds like there may be an incomplete or invalid field on your form which is preventing you from submitting it. If you are unable to locate this field, I would suggest contacting our Support team directly, who will be able to guide you through completing your form successfully. You can open a case or Live Chat with our Support team here: https://help.powerschool.com/t5/Support-Case-Chat/ct-p/SupportCaseChat