me and my friend have a server that worked befor but now ti dosnt start anymore my friend says (he is hosting the server ) that it has something todo with the tier installer and the register of the item

i dont know how to reproduce it just happned at some point

https://www.technicpack.net/modpack/the-tardis-mod-plus.876419 thats the modpacj were using we also added advanced rocketry and pherpials++

he says nothing realy in crash log to be exact no crash log at all

• 1.7.10 is unsupported
• no logs = no help

Hey, I've been having the same issue here, and there is no crash report per say, but the server logs do contain this:

[20:52:01] [Server thread/INFO] [FML/]: Applying holder lookups
[20:52:01] [Server thread/DEBUG] [FML/]: Unable to lookup Mekanism:TierInstaller for public static net.minecraft.item.Item mekanism.common.MekanismItems.TierInstaller. This means the object wasn't registered. It's likely just mod options.
[20:52:01] [Server thread/INFO] [FML/]: Holder lookups applied

I've checked through all available mekanism-related config files, and haven't found anything to do with the tier installers.