Thank you for reaching out for assistance on the PowerSchool Community!
This could be caused by a required field that is missing information or a field with information entered in an invalid format. You will need to correct these fields before you are able to submit your form. The common fields that are overlooked are the fields that require information of contacts other than the primary contact such as parent two.
If you still are unable to submit the form, I recommend clearing the browser cache and to use Google Chrome or Mozilla Firefox internet browsers.
I'll link an article that should help walk you through this process:
Please feel free to reach out to us if you have any further queries.