0. ALWAYS PROVIDE INFORMATION ABOUT MODLOADER (Fabric / Forge) AND MOD VERSION (For Example 1.19.2-8.2.10)
   Fabric version, and the mod version is 1.20.4 as well as the fabric version

1. Describe the bug
   When I try to use the backpack in single player it works perfectly well, but when I try to use it in multiplayer, when I go to creative and get a bag, it gets into a slot, but then when I press b or right click, it doesn't work, And if i break any brick, the backpack gets changed with that brick, it's like it was never registered.

2. Write steps to reproduce the bug

3. I change the game to creative in multiplayer

4. I put the backpack in a slot after choosing any of them

5. I break any brick, that brick replaces the backpack (pressing right click or b does not open the backpack as well)

6. What is expected behaviour
   The backpack should open when I press b or right click

7. Screenshots (If applicable)

install traveler sbackpack on server

Do you know anywhere that can guide me on how to do that? Like is it just as simple as making a mods folder and putting the traveler’s pack jar file there? Im really not sure and I’d be very grateful if I can get some extra help!

I know that fact, but and i have mod in the folder and i have the mod installed in the server but its still not working

you have to set up forge server you cant use mods on client without mods on aerver learn that on your own