mysqli_sql_exception

HTTP 500 Whoops, looks like something went wrong.

Too many connections

Exception

mysqli_sql_exception

Show exception properties 
mysqli_sql_exception {#5125
  #sqlstate: "HY000"
}
in /home/sa236595/public_html/libraries/vendor/joomla/database/src/Mysqli/MysqliDriver.php (line 236)
An Error Occurred: Whoops, looks like something went wrong.

Sorry, there was a problem we could not recover from.

The server returned a "500 - Whoops, looks like something went wrong."

Help me resolve this