If you mean this:
[18:34:25] [Netty Server IO #2/INFO] [FML]: Attempting connection with
missing mods [spongeapi, sponge, mercurius_updater, totaleconomy] at
That's normal for Forge. It detects all mods, and reports whatever is present whether or not they are actually needed. They aren't, as they are all server-side plugins.
I think it's something else is stopping you from logging in.