TYPO3 Core

Thanks for the report.

This is probably related to #89733, but I'm unable to reproduce.

Would you like to add some more reproduce information? Your current description is a bit sparse. Maybe we're able to reproduce the issue with a more detailed click-here-do-this-then-that description.

Thanks for the quick response!

I try to give a little more info.

After the upgrade to 10.4.6 i stepped trough the upgrade wizzard. One problem with the extension weather2 i skipped by disabeling weather2.

Then i did a [php ...] referenceindex:update with the result Core: "Exception handler [...]" at the position "Update index of table tt_content".

Trying to run selective like in "typo3/sysext/lowlevel/README.rst" described, leads to the same error when at the command with --update-refindex parameter.

The Exception handler error occurs also when inserting a content element, but the creation of the content element was successfully.

I did the upgrade 3 times with the same results. I started to disable extensions, but i think there is no influence to referencindex. I switched to debug modus, but for me it did not help to find a solution.

What else of information do you need?

Weird. I actually suspect some third party (non-core) extension is doing funny things.

Could you go to:
Admin tools -> Settings -> Configuration Presets -> Debug settings -> Select and save "debug"?

This should give you a full backtrace when exceptions occur. This could help to see where your issue comes from.

Additionally, I still don't understand when exactly something goes wrong. You simply add some content element in page module, then save it, and then the exception pops up?

This is the solution.

Thank you!