I wanted to add simple sieve automation instead of the auto sieves to my modpack, but fakePlayersCanSieve doesn't seem to work with it. I have checked the code, there seems to be no problem but it still just doesn't work (user set to Activate Block with Item (Right Click))

it works for me. Is your mechanical user set to always on? Also is it facing down directly on the sieve? If you try and manually do it dose it work?

@drmorgmd My mechanical user is set to Always On, I even tried cycling through all the different redstone modes, adding speed upgrades and that didn't help. I have also tried a few different placements of the user, either above the sieve facing down, or next to the sieve facing it, even under the sieve but nothing worked. The sieve is a 4×4 multiblock and I can sieve manually.

Ok the only thing i can think of is that you have an issue with your "true" make sure you have no spaces after the = and its all lower case.

If this issue persists please post your config file and a screenshot of the user's interface.

If you still have this issue with the latest version please open a new issue with more information (including all mods installed and their versions).

The issue wasn't present when I played Stoneblock. It was probably my fault as dmorgmd suggested, but I don't have the pack anymore so I can't check.