Error bug:Warning: wp-includes/random_compat

Hello. At the top of my website recently it appeared error bug:

Warning: require_once(./byte_safe_strings.php): failed to open stream: No such file or directory in /nfsmnt/hosting1_1/0/0/00e9c28b-a183-4b5c-b1bb-007bba512ecb/nonstopfit.sk/web/wp-includes/random_compat/random.php on line 40

Fatal error: require_once(): Failed opening required ‘./byte_safe_strings.php’ (include_path=’.:/usr/php55/lib/php’) in /nfsmnt/hosting1_1/0/0/00e9c28b-a183-4b5c-b1bb-007bba512ecb/nonstopfit.sk/web/wp-includes/random_compat/random.php on line 40

I installed any new plugins, or I’m not interfere with the operation of the page.

Someone had a similar problem? Thanks