Hi Arlex... Thanks for being there and the video clip there... I get this after logging in to Fitbit...

The app you're trying to connect did not provide valid information to Fitbit. Please report this issue to them.
Developer information: invalid_request - Invalid redirect_uri parameter value

I'm adding to this ticket my login on the site so you can perhaps test with my account too!

Hm, that strange, I did tried to login with your site account and fitbit account, it seems look fine for me.

Is it that error shown up when you click that sign in with fitbit button from your profile?

Yes I'm using that same button - can you try it using Google Chrome Browser?

It seems work fine for me too.

Thanks for your time on this. I tried Safari browser and it worked fine... so based on your successes too perhaps it's my Google chrome history or something - I'll try clearing everything and report back soon... will mark this closed if it works!

OK thanks again for testing this with me. I did in the end have to clear everything from Chrome history - including saved "Passwords and other sign in data" - and then it did work... so all good. Thanks - Couldn't have done it without you showing it was working for you.

Thanks for updating Andy, glad that your issue is resolved now.