You may receive a message such as “Maximum execution time of 30 seconds exceeded” or “Maximum execution time of 60 seconds exceeded”. This means that it is taking to longer for a process to complete and it is timing out. There are a number of ways to fix this error.
Make sure you back up .htaccess before you edit it.
Add the following line to .htaccess:
php_value max_execution_time 60
Add the following to php.ini
max_execution_time = 60
If you are unsure of how to make these changes, or if you are on shared hosting that prevents you from making them yourself, you should contact your hosting provider and ask them to increase your maximum execution time.