Board Thread:Support Requests - Designing Your Wikia/@comment-2177054-20160607140816

I have created this template and if I test the code it generates outside of Wikia, it works, but on Wikia it says "insecure input" due to usage of "background:url". How to make it work on Wikia?

http://spongebob.wikia.com/wiki/User:AW10/CoverImage 