Please
- locate the file
[XAMPP Installation Directory]\php\php.ini(e.g.C:\xampp\php\php.ini) - open
php.iniin Notepad or any Text editor - locate the line containing
max_execution_timeand - increase the value from 30 to some larger number (e.g. set:
max_execution_time = 90) - then restart Apache web server from the XAMPP control panel
If there will still be the same error after that, try to increase the value for the max_execution_time further more.