I have the same issue @shiv2817 – please help me out!
I have only two reviews and they show up in the front- and backend. However, the total rating shows up neither in the front- nor in the backend.
This is my test-page: https://immobilien.claudiusthelen.de/immobilienmakler-greifswald/
Here are my reviews: https://ibb.co/b3xM33Z
I‘ve tried clearing the cache of the plugin, added billing details and found no error message.