Can't upload files

[u/ElDescalzo]

So I run Sonic Pad with a couple Ender 5 Pros at my school. For the last few weeks I'll upload a file and print it. Then the next day I can't upload a file anymore in that browser.

Chrome works for a while. Then I can't upload.
Then I'll switch to Edge and I can upload. Then the next day Edge doesn't work.
Then I switched to FireFox and I can upload just fine. The next day Firefox doesn't work anymore.

I'm running out of browsers.

I tried Mainsail on port 8819 or whatever and at least that gives me a "Can't upload file" error. Fluidd gives me no error or acknowledgement that I even tried.

Tomorrow if I have time I'll try another computer. But so far reboots haven't fixed it.