I’m having a similar issue, so I thought I would post my experience.
I just set my doorbell up yesterday. For all of the times it gets triggered to record, I try and look at the event using the timeline bar at the bottom within the Wyze Doorbell context. For each of the recordings, it displays one frame for the picture along with the error “Failed to upload Event. Please check your WiFi connection.” I have looked at the Wi-Fi signal strength in the Device information a few different times, and it has been 2 out of 3 bars consistently. I have not had any issues with the Live view, and the times that I tested pushing the doorbell it sends an immediate notification to my phone and triggers the chime. If I try and view the videos through the Events section, I get the “Error (code 06)” like many of the other posters.
I’m using the Android App on my phone using the latest (non-beta) version. I’m on the latest firmware (version 18.104.22.168)
In comparison, I have been using a Wyze Outdoor Camera at my front door using CamPlus with no issues.