Seriously, use a mod manager.
If the versions of Artifact of Knowledge or TILER2 (or possibly any other mods) are different between your game and other players' in multiplayer, things WILL break. If TILER2 is causing kicks for "unspecified reason", it's likely due to a mod version mismatch. Ensure that all players in a server, including the host and/or dedicated server, are using the same mod versions before reporting a bug.
While reporting a bug, make sure to post a console log (path/to/RoR2/BepInEx/LogOutput.log) from a run of the game where the bug happened; this often provides important information about why the bug is happening. If the bug is multiplayer-only, please try to include logs from both server and client.
Artifact of Knowledge adds an alternate item acquisition system to the game, a la Artifact of Command and/or Sacrifice, which is heavily based on the upgrade system from the bullet-heaven roguelike Nova Drift.
While enabled, the Artifact will add a second level system, upgrade levels, which gives levels slightly faster than the vanilla system and grants one upgrade point per level. Pressing [U] (rebindable in mod config) will open the upgrade menu, presenting a selection of 5 new items and 3 gear swaps (equipment). Only one of these options may be selected; at which point the upgrade point will be spent to obtain that item, then all of the options will be rerolled.
Every 5 levels and 15 levels, the selection of items will be upgraded to uncommon or rare, respectively. Any offered item also has a small chance to be Void and a smaller chance to be Lunar.
The 5 latest updates are listed below. For a full changelog, see: https://github.com/ThinkInvis/RoR2-ArtifactOfKnowledge/blob/master/changelog.md
(🌧︎: Involves an accepted GitHub Pull Request or other significant assistance from the community. Thanks for your help!)
1.0.1 The Pobody's Nerfect Update
1.0.0