Task T6571 (https://phabricator.miraheze.org/T6571) regarding Christipedia wiki is closed as invalid, because it is not an error but a configuration issue that I can resolve. Universal Omega commented in T6571: "Hello, you must enable the writeapi and the edit rights on Special:ManageWiki/permissions to resolve this." However, the mentioned rights seem to me well configured. Please, would someone take a look and help me?
Enabling the right "apihighlimit" does not solve the problem. I have disabled this right again.
Note: all users wit editing rights are members of the user rights group Editor. Enabling and disabling rights are happening to this group. Refer to: https://www.christipedia.nl/wiki/Speciaal:ManageWiki/permissions/editor.