it seems that there is a general bug in XWiki in 10.10 and 10.11.*
If I want to create a page or a glossary entry, the following message is displayed when I click “save&view”:
After a while the error message disappears. Then I refresh and can see the created page/entry.
This is very vexing for users.
This is not something anyone has reported AFAIK so it could be related to some xwiki setup you have or some extensions you have installed and that listen to the save event and do something that fails. Maybe you could check and uninstall extensions you may have installed (such as the glossary app) and see if it helps?
@vmassol we had a similar issue on xwiki.org recently. Create / save / upload were reported as failing even though the operation succeeded. I don’t know if we fixed it.
Yes we have it on xwiki.org but xwiki.org is on an old version: 8.4.4 and we didn’t change that version in years and we used to not have the problem on xwiki.org so I assumed this got to do with something that we changed in the infra part of xwiki.org somehow and not coming from XWiki itself. I could be wrong. We need to understand what changed on xwiki.org
On xwiki.org the problem is most probably caused by a bad HTTPS setup: relative URLs are resolved as HTTP even if the current request was made with HTTPS. This leads to AJAX requests being blocked due to Mixed content - Security on the web | MDN . You can see the error in the JavaScript console.