Updated several instances of NC using web updater.
From 16.0.5 was ok.
From 16.0.4 after first stage (to continue with web update) page doesn’t work (Internal error 500). Had to use occ upgrade command to finish update.
Logfile contains this error:
[proxy_fcgi:error] (…) AH01071: Got error ‘PHP message: PHP Fatal error: Declaration of OCA\GroupFolders\Versions\VersionsBackend::getVersionFile(OCP\IUser $user, OCP\Files\FileInfo $sourceFile, int $revision): OCP\Files\File must be compatible with OCA\Files_Versions\Versions\IVersionBackend::getVersionFile(OCP\IUser $user, OCP\Files\FileInfo $sourceFile, $revision): OCP\Files\File in /var/www/web/apps/groupfolders/lib/Versions/VersionsBackend.php on line 38’
NC installations otherwise was identical except 16.0.4 had Group folder app (updated to latest version before NC update to 17).