It looks like this is the result of our slug format changing and background images only working with the old format. As of this commit it supports both:
https://github.com/discourse/discourse/commit/8e3f667d7c6f515dc91f3ddb47b0c3b3b31782f1
It looks like this is the result of our slug format changing and background images only working with the old format. As of this commit it supports both:
https://github.com/discourse/discourse/commit/8e3f667d7c6f515dc91f3ddb47b0c3b3b31782f1