Access denied error accessing my surveys

Today a change happened within the Qualtrics Survey Platform that broke all of my surveys. If I try to access

https://unc.az1.qualtrics.com/jfe/form/SV_5BIjIAz4c6DR2Fo?ReturnURL=https%3A%2F%2Fsomedomain.edu%2Fqualtrics%2FSV_xyz%2Fget-response%3FQ_R%3DR_abc%26session%3D%24%7Be%3A%2F%2FField%2FSessionID%7D%26ONYEN%3D%24%7Be%3A%2F%2FField%2FONYEN%7D%26startDate%3D%24%7Bdate%3A%2F%2FOtherDate%2FY%252Fm%252Fd%2F-1%20day%7DT%24%7Bdate%3A%2F%2FCurrentTime%2FMS%7DZ%26endDate%3D%24%7Bdate%3A%2F%2FOtherDate%2FY%252Fm%252Fd%2F%2B1%20day%7DT%24%7Bdate%3A%2F%2FCurrentTime%2FMS%7DZ%26rid%3D%24%7Be%3A%2F%2FField%2FResponseID%7D%26sid%3D%24%7Be%3A%2F%2FField%2FSurveyID%7D

I receive an error saying:
Access Denied
You don't have permission to access "http://unc.az1.qualtrics.com/jfe/form/SV_5BIjIAz4c6DR2Fo?" on this server.
If I exclude the query string and simply access

https://unc.az1.qualtrics.com/jfe/form/SV_5BIjIAz4c6DR2Fo

then no error messages occur, so I know it is a problem with the Qualtrics query string parser. This is happening on all of my surveys. I use custom query strings in my distribution URLs heavily, so all of my applications using Qualtrics are out of commission and we are having to cancel appointments tomorrow due to outage. I submitted a help ticket (CS_0B5D010C87674519) and it was closed without any followup or response as to why it was closed. Some sort of resolution on this issue would be nice. - thank you