https://twitchtokengenerator.com/ as a temporary alternative.
Simply click on the option "Bot Chat Token" and copy the portion that says "access token" (you may need to add oauth: in front of it.

Twitchapps TMI is discontinued, (which is where the "New OAuth Token" button takes you), is there a recommended alternative? Otherwise, this mod is unusable. Thanks!

Seconding the comment that I can't access anything when pressing "New OAuth Token." Same message.

Not sure where to report this, but for some reason clicking New OAuth token just takes me to a page that says "this site can't provide a secure connection", says it "sent in invalid response". Not sure if something is wrong on my end or what, but I can't get an OAuth token to connect the bot to twitch, ergo, I can't play the mod.