Hello there. I stumbled across this thread earlier today. You’re not the only one reporting this issue.
https://forums.wyze.com/t/error-code-06-when-attempting-to-view-event-videos/149374/50
Some are stating if you remove the cam plus subscription from your cam, wait awhile, then add it back it resolves the issue. Others are reporting you need to remove the cam plus subscription from your cam, delete the cam from your account, reset your cam, add the cam to your account, then re-apply the cam plus subscription.
I have two cams with cam-plus subscriptions (one v3 and one WCO) and haven’t had this particular error for a few weeks now. Apparently this issue is a hit or miss situation and doesn’t impact everyone with cam plus.