Where did you obtain that BBCode without HTTPS ?
Any way, a couple of tips:
-
Enabling
download remote images to localand removing imgur fromdisabled image download domainssettings will ensure this never happens by hosting all images locally. -
Don’t know who hosts this forum, but it definitely is not following our Discourse official Standard Installation guide. Because of that it doesn’t have HTTP/2 enable so everyone get a slower site.