You can either add the script to your personal JS (or import it via your global.js so you have it on every wiki), or see https://dev.fandom.com/wiki/Dev_Wiki:Gadgets#Gadget_requests to get it added as a gadget on the wiki.
See this help page.
No, I don't think so, since it might have been cached for you, but you could try it now and see if the cache is updated? I just tested it myself and it worked for me, so its atleast not an issue with the script.
Could you try it now? It might just have been cache.
Yes to you used it right after, or yes you got errors?
Hey, if you check your console, do you have any errors, or are there any errors showing up in banner notifications?
Also, did you edit the MediaWiki page right before trying to use the script?
Yeah, as long as you have the JS imported (which you probably already do since your other RCM page is working), any RCM page should work, no extra JS needed.
Have you tried reading RCM's doc page?
You could just create another RCM page and have it open too, or you could use tabber tabs.
You put an embed in there or just a link, it should have options that you can use to build the body.
You take the RSS applet and then use the HTTP webhook applet to post the data from the RSS to the webhook, which gets posted to Discord
Nope, the AF hasn't been changed.
Also there shouldn't be any wikia.com links left in scripts, only comments and backward compatibility support (maybe?).
"I don't think anything bad will happen"
famous last words
You can't prove that.
Uh no. You should be reviewing the edits your bot makes and making sure they're correct. Also JSRT is for security, not code review.