By default, if we upload image file , only 2M available on wp system. We could raise file size limit as we need.

the absolute working (for many server type) tips is, change PHP Configuration manually. To do this, follow steps below:

  1. Login to your webmin (https://yoursite.com:10000)
  2. on search module form, type “php conf”
  3. at result choose “PHP Configuration” like this
    php config

  4. change below value, just use CTRL F and find the corrent params
    post_max_size = 41M
    upload_max_filesize = 40M
    memory_limit = 128M
    max_execution_time = 200
    max_input_time = 200

  5. save