All items' weight is 0.

Installation

Read "Correct folder and file structure".
Delete xinput1_3.dll in \Palword\Pal\Binaries\Win64 if you installed the xinput version of REUE4SS.
Download REUE4SS: Releases · UE4SS-RE/RE-UE4SS (github.com). Latest version is 3, direct link to 3: Release v3.0.0 · UE4SS-RE/RE-UE4SS (github.com). File name: "UE4SS_v3.0.0.zip".
Drop its files to \Palword\Pal\Binaries\Win64.
Download the mod.
Drop its folder in \Palword\Pal\Binaries\Win64\Mods.
Read "Notes".

Correct folder and file structure

\Palword\Pal\Binaries\Win64\UE4SS.dll
\Palword\Pal\Binaries\Win64\UE4SS-settings.ini
\Palword\Pal\Binaries\Win64\dwmapi.dll
\Palword\Pal\Binaries\Win64\Mods\NoItemWeight\Scripts\main.lua

Installation for dedicated server

Read "Correct folder and file structure".
Download REUE4SS: Releases · UE4SS-RE/RE-UE4SS (github.com). Latest version is 3, direct link to 3: Release v3.0.0 · UE4SS-RE/RE-UE4SS (github.com). File name: "UE4SS_v3.0.0.zip".
Drop its files to <wherever your server is>/Pal/Binaries/Win64.
Download UE4SS_Signatures from the mod page.
Drop its folder in <wherever your server is>\Pal\Binaries\Win64.
Download the mod.
Drop its folder in <wherever your server is>/Pal/Binaries/Win64/Mods.

Correct folder and file structure

<wherever your server is>/Pal/Binaries/Win64/UE4SS.dll
<wherever your server is>/Pal/Binaries/Win64/UE4SS-settings.ini
<wherever your server is>/Pal/Binaries/Win64/dwmapi.dll
<wherever your server is>/Pal/Binaries/Win6/Mods/NoItemWeight/Scripts/main.lua

Notes

If you want help, info on modding the game and your server you can join the Palworld modding discord server: Invite for Palworld modding discord

REUE4SS generates a log file named UE4SS.log in \Palword\Pal\Binaries\Win64\. You can open it with Notepad to see for errors.

If you installed everything correctly you should something like "Mod 'Pause' has enabled.txt, starting mod." in your log file.

If the mod isn't working for you or if you have any errors you can share the contents of your log file on Pastebin.com and share the link in the bugs section of the mod.

To help with crashes open UE4SS-settings.ini in \Pal\Binaries\Win64 and set bUseUObjectArrayCache to false

No item weight