You (person having issues with Cactbot) will want to replace the URLS in Browsingway etc. with ones that don't use the IINACT proxy url.
Raidboss Timeline
http://overlayplugin.github.io/cactbot/ui/raidboss/raidboss.html?alerts=0&timeline=1&OVERLAY_WS=ws://127.0.0.1:10501/ws
Raidboss Alert
http://overlayplugin.github.io/cactbot/ui/raidboss/raidboss.html?alerts=1&timeline=0&OVERLAY_WS=ws://127.0.0.1:10501/ws
Combined Alerts & Timeline
http://overlayplugin.github.io/cactbot/ui/raidboss/raidboss.html?OVERLAY_WS=ws://127.0.0.1:10501/ws
Config Window
http://overlayplugin.github.io/cactbot/ui/config/config.html?OVERLAY_WS=ws://127.0.0.1:10501/ws
Basically, just swap http://proxy.iinact.com/overlay/ with http://overlayplugin.github.io/
You should be able to change any problematic cactbot URL using this as a reference. Discord sucks for trying to use for information, so hopefully this will help, credit to the help-general channel for finding this fix.