How to Fix Fatal Error: Maximum Execution Time Exceeded in WordPress
To trace the problem, let’s start at your plugins. If the problem goes away when you disable your plugins, then a faulty script in one of your plugins is to blame. Read this article to learn how to disable plugins and how to find the particular plugin causing your issue: How To Disable WordPress Plugins Using FTP.
How to Fix Fatal Error: Maximum Execution Time Exceeded Error in WordPress
If you already have plenty of plugins installed and do not want to use additional one or it simply did not fix your issue then you can edit .htaccess file manually to increase maximum execution time limit. The easiest way is to use File Manager located in your hosting control panel. If you are not sure how to locate the .htaccess file there is a detailed guide here. You will need to enter the following code at the bottom of .htaccess file and Save it: