iOS 10.3.4/iPad3,6/Socket 1.1 - Zebra 1.1.28-L1 - Permissions Error

[gtumanyan]

When bundled Zebra starts it says "su/sling does not have permission to set the uid or gid. Please verify the permissions of the file located at /usr/libexec/zebra/supersling." so I cannot update Zebra or install Filza to fix permissions.

I tried respringing, rebooting, and resetting all settings, but none helped.

P.S. Zebra update should be disabled on iOS 9-10, where the modified build is used.