For some reason, when I add Quark to my server and the person has it, the FML says that the versions are incorrect even though the files are the same. This has happened with two of my servers and this doesn't happen to me, only my friends. The older versions did work for me.
These are the two servers I have not working with Quark
Quark versions: Quark-4.0-441 and Quark-4.0-450
Dedicated server hosted on my PC
Port forwarding done by Hamachi VPN
Also, other mods like Create, Mekanism, Applied Energistics 2 and a lot more were present. If someone needs a full list I can send it.
Thank you for the help 🙂