How can we help?
Document says that the param safari_web_id in init() is the Safari Web ID for your uploaded Safari .p12 certificate. If we want to use Safari certificates that OneSignal Provides automatically, safari_web_id is required? It seems blank safari_web_id prevents initializing in here. I hope that safari_web_id is required only when using custom Safari certificates.
I'm not familiar with OneSignal and not English Speaker, so my understanding may be wrong. If so please point it out.