V9 upgrade from 8.5.6 breaks

When trying to upgrade from version 8.5.6 to version 9.0, I get the error shown in the attached screen shot and the upgrade breaks. Any ideas?

The same here:

Ein unerwarteter Fehler ist aufgetreten.

Concrete\Core\Updater\Migrations\Migrations\Version20211023155414::upgradeSizeValue(): Argument #1 ($legacyValueValueData) must be of type array, int given, called in /…/…/…/concrete/src/Updater/Migrations/Migrations/Version20211023155414.php on line 106

Hi,
I think you can safely uninstall the migration package which helps updating a long time ago. Afterwards it should work … at least this error should not show again.
Olaf

I’ve posted the bug on GitHub. The response was that it is already fixed for the coming version 9.0.1

Mine work now after i copied back the concrete folder from backup, added some missing files manualy. Set php to 7.4 . I saw then a mixed but working website. I copied again the V 9 concrete folder, set the theme from clonamental to elemental and then website was ok. If i switch to php 8 it does not work. For now with php 7.4 it’s ok.

Hi,

thanks for responding.
I created the complete page new with 9.0.1.
Olaf