Sunrise calendar app not working properly on fp2

My sunrise calendar spp does not seem to work properly. Certain functions just dont work. I cant invite ppl to events anymore for instanxe and also cant edit events after ive created them which is really quite annoying. I had similar issues with other apps but they were solved by re-enabling the privacy settings, but for the sunrise app it doesnt seem to work. Help please!!!

Did you already try this workaround?:
Re-enable Privacy Impact by unticking the option found at:
Settings > Sound & Notifications > Privacy Impact