Failed to load mods: ...eshifted__/prototypes/entities/time-shifted/inserter.lua:16: attempt to index field 'sheet' (a nil value)
stack traceback:
...eshifted__/prototypes/entities/time-shifted/inserter.lua:16: in main chunk
[C]: in function 'require'
...fted__/prototypes/entities/time-shifted/time-shifted.lua:1: in main chunk
[C]: in function 'require'
janus-reshifted/data.lua:18: in main chunk

I had a similar error but mine said 'thruster' instead of inserter. disabling Disco Thrusters fixed mine, so I'm betting yours is an incompatibility with a mod that attempts to change all inserters.
including your full modlist would help the dev identify incompatibilities

Sure if could get a git or discord page for file.

theres a link to the github on the modpage

That page will go to the old author which is not nice to bother them i would say!