I didn't see a 5.5.112 for the E7S. Could be the reason if you are trying the E7 firmware on a E7S. Not sure why they split this platform up with a subgroup.
Wanted to post this for anyone that wanted to switch to Hikvision firmware.
---CHANGING FIRMWARE WILL NOT ADD NEW FEATRUES.. these are coded separately from the firmware. If you don't already have smart events it will not add them.---
It may fix or enhance existing functions or even stability...