How can I solve a WordPress publishing problem?

enter image description here I encounter a problem on WordPress as soon as I try to publish a page. A message appears telling me, t that the publication failed I do not understand I uninstall my extensions. and call 1 & 1, my host I have enough memory ... I even changed wifi connection, delete the images are useless but nothing helps. Help me, I beg you

Solution

Install and activate the Classic Editor plugin. That'll help if you are using Gutenberg editor.