Uncaught TYPO3 Exception Class 'TYPO3\CMS\Core\Database\ConnectionPool' not found under TYPO3 7.6

[mediaessenz]

After installing this extension under TYPO3 7.6 and click on the page module in Backend I get this exception:
Class 'TYPO3\CMS\Core\Database\ConnectionPool' not found

[NamelessCoder]

7.6 support was removed a while ago in code, but I noticed it wasn't done in the manifests. You shouldn't have been able to install it there at all - sorry for the confusion.