Known Bugs

FileCollector::addFileObject()

Prompt

Argument 1 passed to TYPO3CMSFrontendResourceFileCollector::addFileObject() must implement interface TYPO3CMSCoreResourceFileInterface, boolean given, called in …/typo3/sysext/frontend/Classes/Resource/FileCollector.php on line 118

Cause

Unproper configuration of a relation to a file.

Solution

Probably the page resource media is linked with a file, which is deleted. Please delete the relation at page resource media.