"Input line too long" error applying Cloud SWG policy from Management Center after updating the exception page

Products

• Cloud Secure Web Gateway - Cloud SWG
• Management Center
• Management Center - VA

Issue/Introduction

After applying an update to the configuration via UPE, the corresponding policy push triggered the following error:

 

Environment

• Cloud SWG policy in UPE mode (managed via Management Center)

Cause

Image applied to exception page exceeded limit allowed by Cloud SWG.

Resolution

Reduce the size of the image applied (original was 2.5MB, which was reduced to 35kB).

Additional Information

• Why adding a Base64 image to the reference proxy exception page prevents the Cloud SWG policy from being deployed?