I created a secured feature service via ArcGIS for Server and then added it as an item to AGOL. This service is used by Survey123 using the submission url parameter. I was able to access this service from AGOL over the past year successfully. Just recently, I went to access the service url from AGOL and now get the error below. I am able to access the service just fine directly from ArcGIS for Server, just not from AGOL. Could a recent AGOL update have affected this functionality? Our client is also getting the same results from his AGOL organization. We have not changed this service over the past several months.
Services Directory has been disabled.