Cannot set keybindings, because I deny the dialog (?)

[arunstop]

Hey lads I have this problem with GSconnect extension, whereas I cannot assign any key to pull/push the clipboard to my phone.

I suspect its because of first time I tried to set it up, a dialog shows up and asked me something about Allow and Deny something, but I accidentally pressed something on my keyboard, so it disappear. Now the extension won't show that dialog anymore and whenever i tried to set a keyboard shortcut to pull and push clipboard, it said the keybinding is already used, but it's not.

How do I fix this, how do I make that dialog appear again? I tried uninstalling the extensions but it's still the same. Is there any way I can reset the cache/settings, so that dialog would appear again?