There are a couple basic things to ask.
What version of the Kokaleka app did you install ?
Version 3 is the most recent.
When entering the username/password (credentials), it is case sensitive so ensure you get that correct.
Your credentials for iptv66 will (may) have 3 letters included.
One at the start, one in the middle and one at the end. So make sure you are not confusing a zero for a capital letter O.
If you have all this correct and still same results then uninstall the app and reinstall for results.
I don't think you need to worry about the server portal. If I remember correctly the server portal will be an automatic thing, no need to worry about that.
This app will know what your server portal is , thru your credentials.
it's been a while since I fired up this app. so going from my sketchy memory only
