Spreed.me file not found error

Hi all,
New to nextcloud and spreed so excuse my ignorance.

I have installed nextcloud and the spreed.me module and can see it visible up the top in next cloud.
However when I click on it, it always takes me to a page that says file not found.

Your help is appreciated.

How exactly (where, using which settings) did you configure the Spreed.ME app?