increase memory limit on wamp

The php.ini file usually is on "C:\wamp64\bin\php\php_ver" where "php_ver" is the version of the PHP you are using (please note the latest version of wamp includes two version of PHP, make sure you edit the right php.ini file)

then on line 397 you can find memory_limit = 128M

change it, save it, and restart the services.