Step 01: Login into your cPanel account.
Step 02: Locate the file section and then click on File manager.
Step 03: Navigate to the file in public_html/any other folder (you can also select multiple files).
Step 04: Click the Permissions button from the top menu.
Step 05: Select the desired file permission in the Change Permission window.
Step 06: Click the Change Permissions button.
OR If you still have trouble please email us at support@adndiginet.com for more technical support.