Typical way to fix – edit php.ini
upload_max_filesize = 20M
post_max_size = 20M
Server reboot may be needed for new values to take effect. You can see value currently in use on your sites “/wp-admin/site-health.php” page.
Issues
Ensure you are editing the correct php.ini file!!!! Use phpinfo(); to make sure
Feel free to comment if you can add help to this page or point out issues and solutions you have found. I do not provide support on this site, if you need help with a problem head over to stack overflow.