Upload of images not working properly: June 3rd 2019

Hello there, 

I noticed that jpgs and pngs (possibly other media too) are not easy to upload today, as the application sends an error message. (with the 'dismiss' option).

Once I go back to the menu, I am automatically logged out from my account and need to provide my credentials anew to move back to the course.

After logging in again it starts working again for a little while, then the same problems (a)rise.

Thanks for your attention
Best

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