Merge pull request #47624 from nextcloud/backport/47567/stable28

[stable28] fix(config): Avoid error messages for restricted opcache API

lib/private/Config.php

@@ -215,7 +215,7 @@ private function readData() {
 
 			// Invalidate opcache (only if the timestamp changed)
 			if (function_exists('opcache_invalidate')) {
-				opcache_invalidate($file, false);
+				@opcache_invalidate($file, false);
 			}
 
 			$filePointer = @fopen($file, 'r');