

This is BepInEx 5.4.6 pack for Valheim.
BepInEx is a general purpose framework for Unity modding. BepInEx includes tools and libraries to
BepInEx is currently one of the most popular modding tools for Unity on GitHub.
This pack is preconfigured and usable for Valheim modding.
In particular, the changes from base BepInEx releases are:
BepInEx.cfg with console enabled.If you are installing this manually, do the following
Extract the archive into a folder. Do not extract into the game folder.
Move the contents of BepInExPack_Valheim folder into <Steam Location>\steamapps\common\Valheim.
Check that you have installed it correctly. If done correctly, your folder will look as follows

Follow either Windows or Linux game running instructions below:
No need to configure. Simply run the game. If everything is correct, you will see a console pop up.
Make start_game_bepinex.sh executable with chmod u+x start_game_bepinex.sh.
In Steam, go to game's properties and set game's launch arguments to
./start_game_bepinex.sh %command%
Note to advanced users: You can change ./start_game_bepinex.sh to full path to the script. This way you can install this pack entirely outside of game folder.
Run the game via Steam.
At this moment you will not see any clear indication if BepInEx works. It is suggested to test by installing a simple plugin such as MessageCenter from BepInEx.Utility.
start_server_bepinex.sh executable with chmod u+x start_server_bepinex.sh.start_server_bepinex.sh to change the launch parameter like you would with Valheim's own launch script.start_server_bepinex.sh to start the server.If done correctly, you will see BepInEx bootstrap messages in the terminal.
NOTE
Valheim modding is still at its infancy and there is may not be single modding community.
This is common with new games, please have patience with your issues.
At this moment, you can use the following channels to ask for help