Uncaught (in promise) TypeError

In console I see this error when the page load

 
Uncaught (in promise)
forum.js?v=5a274e03:1025
TypeError: Cannot read properties of undefined (reading 'bind') at forum.js.....

And this error when I go back to a page:

 
Uncaught (in promise)
forum.js?v=5a274e03:1025
TypeError: Cannot read properties of undefined (reading 'unbind') at forum.js......

Does anyone have an idea why this?

it appears to be related to addPusher.js as it sometimes shows that JS file the culprit instead of forum.js