Hi @jakobiaa ,
I am glad to help,
This is an issue we are currently investigating
Please go to Tools > Site Health > Into Tab (at the top), then click Copy Site Info to Clipboard. Paste the info in a text file (CTRL+V or CMD +V) and save it.
You can ask your hosting company if they changed or updated something on the server, we are suspecting this could be related to the GD Library or Imagick module in the web server.
You can also ask them if they have a backup they can rollback your site to, (any changes after the backup could be lost though). Then please check the site health info and compare it with the one you saved to see if something is different.
I will take note of this thread to let you know in case we find a fix.
Please keep me posted
Thanks!