@badbureets If you are using Migaku Browser Extension, there's no need for separate Migaku Dictionary addon, as the Dictionary is already implemented with the browser extension and the anki addon. Make sure that you checked 'Enable Recording' in the extension menu:
Try other video sources: if you are using YouTube, try Netflix/Migaku Player. Try using some other browser just to get more information about the problem.

@itsmepairoa "Now you can't use the dictionary without opening the browser."
By this you mean that the new Migaku Dictionary uses the browser engine and therefore opening it up opens up the browser? Because I can definitely open Migaku Dictionary(ctrl+alt+F) without a browser being open.