Follow these steps
1- Open the app
2- Delete the bot if you have already added this bot
3- Enter Bot Id, Bot name, select version as v1
4- Enter custom as https://r4.cloud.yellow.ai
5- Save the Profile
6- Go and launch the bot
This should work. If not try uninstalling and installing the app in worst case scenario and follow above steps again.
I am able to load the pwa link, weuse same within the sdk.