Updated wordpress and then internal server error

As soon as I updated the wordpress my website shows :

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at [email protected] to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

I CAN’T GO AT ALL AT THE WEBSITE . I TRIED WITH THE htaccess BUT NOTHING. HELP PLEASE

[No bumping. If it’s that urgent, consider hiring someone.]