You are going to have to contact @eliamcrest with an Amcrest Support case to request the original firmware (v.20210220).For anyone thinking about installing the latest AD410 firmware from the OP link - DO NOT - if you want event handling to work with Home Assistant, Hubitat, et.al.
I've pleaded with Eli weeks ago to add release notes to this firmware to warn users this is a breaking change/BUG to event handling - OR - to immediately pull this firmware until fixed. No response. The faulty firmware is still listed for download with no caution.