Oh right I forgot about the non-cas. Gonna edit that. Thanks for reminding me
As for the 500 errors, we got the same problem on Omnimaga, but it's far less worse than it was in mid-july and most of August-September, when students bought their calc and came to ask questions. Also it's much less worse than TI-BANK because our errors usually lasts about 5 minutes then the site gets back up, not to mention it occurs during certain hours in general (in France timezone, it would be from 21h to 22h, from 4h to 6h and around 10h). In October we also had some slow loading speeds sometimes.