@MariaG Image insertion isn't working on the entire platform, including: Content > Article > Insert Image.
I've reported the overall issue here:
The ol' Map o' Mystery!
Quoted from support:
'Thanks for reaching out and I'm sorry for the trouble.
This issue has been reported and our team is looking for a solution, in the meantime, you can upload the picture through google drive and share the link in the Q&A, we understand this is not the best way out, this is only a workaround while our team fixes this behavior./
More information on how to do it can be found here https://www.businessinsider.com/how-to-share-files-on-google-drive