Server Version: 1.14.4
OCM Version: 1.7.4
Config for Offhand: https://pastebin.com/BdTvBLNX

Offhand is not working.
Whenever I try to use F (the key to switch an item into the offhand) nothing happens.
When I try to manually put an item in via the inventory it just sends it back out.

Are you sure it is OCM interfering? Do you have any other plugins?

I have lots of other plugins, here is the list.
Im not 100% sure if its OCM but it's the only thing that changes stuff like this so I immediately thought it would be.

SpawnerSilk
Grief Prevention
Disable Elytra
Multiverse-NetherPortals
Multiverse-Portals
Multiverse-Core
OldCombatMechanics
AcceptRules
WorldEdit
Timber Plugin
AltAccountAutoban
EnchantPlus
WorldGuard
DropHeads
Multiverse-Inventories
OpenInv
LaggRemover
etwChat
Chairs Reloaded
CoreProtect
AFK
DeepVanish
Sleepy
JoinMessagePlus
ChatClear [cc]

Please try the following:

1. Stop the server.
2. Remove the OldCombatMechanics JAR from your plugins folder.
3. Start the server again.
4. Check to see if the issue is still present without OldCombatMechanics installed.

If that solves the issue, then something is wrong with your OCM config file. A full server log with OldCombatMechanics installed would be quite helpful.

It works now, how can I get a server log?

Firstly, stop the server & reinstall OldCombatMechanics. Then, after you run the server again and it has finished starting up, look in the logs folder for a file called latest.log. That is the server's log file.

Here is the OCM startup from latest.log
https://pastebin.com/eHZ21rir

Your OCM config is invalid. We should probably just refuse to load anything in that case.

Please post your whole config.

Here is the full config, apologies for not posting it in it's entirety earlier.

https://pastebin.com/y24CVPhp

Please close the interative list with a closing square bracket:

interactive: [enchantment_table,anvil,brewing_stand,trapped_chest,chest,bed,boat,fence_gate,dispenser,dropper,furnace,jukebox,ender_chest,stone_button,wood_button,beacon,tripwire_hook,hopper,daylight_detector,daylight_detector_inverted,item_frame,diode,diode_block_off,diode_block_on,redstone_comparator,redstone_comparator_off,redstone_comparator_on,acacia_door,birch_door,dark_oak_door,jungle_door,spruce_door,wood_door,workbench,bed_block,lever,trap_door,burning_furnace,spruce_fence_gate,birch_fence_gate,jungle_fence_gate,dark_oak_fence_gate,acacia_fence_gate,white_shulker_box,orange_shulker_box,magenta_shulker_box,light_blue_shulker_box,yellow_shulker_box,lime_shulker_box,pink_shulker_box,gray_shulker_box,silver_shulker_box,cyan_shulker_box,purple_shulker_box,blue_shulker_box,brown_shulker_box,green_shulker_box,red_shulker_box,black_shulker_box]

Then try again and check for any errors in the console. you can also check your config file here (or on similar sites).

If it still doesn't work, report back please.

Can you try just OCM on a test server with the same version and see if the problem persists? If not, another plugin is causing an incompatibility. If it still persists, the startup log of the server up until OCM was loaded (and maybe a bit more) would be interesting.

I added the bracket to the end of the interactive line, still doesn't work.

I also think nocooldown is broken as well, the indicator doesn't show up but everything fells like it does no damage when spamclicking.

I used the YAML checker after adding the bracket and it said it was ok.

I turned off every plugin besides OCM and offhand does not work.
What can we do?

Please back up your OCM config.yml file, delete it, let it re-generate the default one, and from there turn off the disable-offhand module. I still suspect it's something wrong with your config, although I did not see anything when I skimmed briefly over your config.

Interesting, there must have been something wrong with your config. Glad it's working now!

I reset the config and added all the same values I had before,
it works now! Thank you so much for your help!