Some tips for TLR to fix their current site issues (we don’t hate you TLR hahaha)
Try disabling javascript in the browser and see if you can post a message then. (We’ve tested it it work).
Try to disable any of the add-ons you installed that could possibly made changes to any of the .js files.
Maybe the header is loading a jQuery version that is interferring with another one.
Or it’s most likely out of date templates or customizations that interfere with the core systems.
Make a full clean update and you’ll be fine.
Thank you @korkmush for the tips
We love you TLR haha