you shouldn’t have to fragment it and that code should work as long as you have the EMBED_URL and DISCOURSE_USERNAME correct. maybe check over your allowed host paths and categories configuration again. 
i don’t know anything about Velo by Wix.
you shouldn’t have to fragment it and that code should work as long as you have the EMBED_URL and DISCOURSE_USERNAME correct. maybe check over your allowed host paths and categories configuration again. i don’t know anything about Velo by Wix.