Backup your php.ini file before you do anything.

Then open the php.ini file so that you can edit it.

Check that file_uploads is set to On (needed to upload files via a PHP script).

Set upload_max_filesize to 64M (or less).

Set post_max_size to 64M (or less).

Set memory_limit, to 64M (or less).

Set max_input_time to 600 or less.

Set max_execution_time to 300 or less.

Save your php.ini file.​

(or minimal modifications):

upload_max_filesize = 500M
post_max_size = 500M
max_execution_time = 500