What PowerSchool Platform are you using? PowerSchool SIS? PowerSchool Learning? Unified Classroom?
I am happy to help you, In order to troubleshoot further, it would be greatly appreciated if you can answer the following questions.
I noticed a file I tried uploading yesterday was never really uploaded. I see it shadowed out and a day later when I click on it I receive the message "The file is still be uploaded and will be available soon." So in some cases the files may not actually be on PowerSchool Learning servers. Even connecting to PowerSchool Learning or UC's Class Pages is hit and miss.
Obviously PowerSchool hasn't been able to throw enough resources at PowerSchool Learning and Unified Classroom to meet up with the increase demands. (Interesting enough, Schoology has experienced very few issues...obviously a much better product and development team...) I would say "Patience Grashopper" but that wears thin after two weeks.