- Log in to WHM as the root user.
- Navigate to “Home / Server Configuration / Tweak Settings.”

- Click on the “PHP” tab.

- Find the “cPanel PHP max POST size” option and adjust it to the desired value, noting that values exceeding 2047MB are not allowed.
- Next, locate the “cPanel PHP max upload size” option and set it to the required value, ensuring that values do not exceed 2047MB.

- Click on the “Save” button after setting the values. Please be aware that restarting your web server may be necessary for these changes to take effect.