TYPO3 Core

• Same issue here - but only on one page with two subpages. I did not find more pages with this error. And it worked before at this day!
• I truncated all cf_cache_* tables without effect.
• I used "SU" for switching to a different user did not work.
• I have a TypoScript Template at the toplevel page, with root-flag set.
• I created an new user and logged in with default language english.
• I created a new Subpage, and got the error
• i removed that subpage to another tree, i do not get the error.

Finally i realized, that on the page and the subpages where the error occurs, there is a typoscript template which deletes "module >". So, i removed that statement, and everything works as expected.

But i do not understand, why that worked before...

Looks like the configuration required for the extbase module is missing

Philipp Gampe wrote:

Some extensions uses the backend API to write log entries or triggers this at least. This needs a frontend TypoScript template. You should not delete the modules. key.

Markus Klein wrote:

Looks like the configuration required for the extbase module is missing

So what’s the solution? What’s missing suddenly (as said before it already worked)?
There’s a frontend template, the website is online.

The copy on the development server (same setup) works as expected by now,
my problem is not related to the mentioned module > issue above imho

I fixed this problem for me by adding

<INCLUDE_TYPOSCRIPT: source="FILE:EXT:beuser/Configuration/TypoScript/setup.txt">
module.tx_beuser {
        persistence {
                classes {
                        TYPO3\CMS\Beuser\Domain\Model\BackendUser {
                                mapping {
                                        tableName = be_users
                                        columns {
                                                username.mapOnProperty = userName
                                        }
                                }
                        }
                }
        }                                                                
}
<INCLUDE_TYPOSCRIPT: source="FILE:EXT:belog/Configuration/TypoScript/setup.txt">

manually in the main Typoscript Template

As I understand the problem it seams to be http://forge.typo3.org/issues/51234 please try the patch from there and give response to it.