Yes, it works. I tried with - http://localhost:10001/auth/callback?callback=http://localhost:10001/custom_configs?product=freshchat&product=freshchat
It’s really strange, i tried like this before making this post. It didn’t worked that time. Now it works .
If it is the case, can you share us the full redirect_uri for both Production & Testing?
Thanks,
Arshath