Create Custom Error pages via cPanel

Step 1: Log in to the cPanel.
Step 2: Click on Error Pages under Advanced panel.
Step 3: Choose on the domain name you want to apply the error pages for.
Step 4: Click on what Error page you want to edit. You may choose on the suggested common error pages or check all the HTTP Error Status Codes to see the full list.
Step 5: Insert the html code in the space provided.
Step 6: Click on Save button to save the changes.