Things were working fine but now whenever someon tries to redeem a kit they get the :file does not exist" error. i've uninsatalled and reinstalled and still the same thing.

seems the dev has stopped supporting this plugin. waiting days and not a singole response from him. posts in support, messeages, etc. just ignored...

same for me too :  file does not exist

I dont know what you guys are doing wrong but i have about 40 kits working at this time with no problems ?, As for support this plugin was last updated 2 months ago , you will have to have some patience regarding response, I had to wait three years to get a problem fixed (proximity alert) and was told after a year that i was being too impatient !
anyway
What are the steps you are using to create the kit ?

I have just opened kit = /kit
and clicked on create new = gives me a panel with empty slots/sections
I filled in the panels for name , usage, cooldown added inventory items ( *making sure my inventory has all the items i want included ) and saved the kit
then i opened the data file
\oxide\data\Kits\kits_data.json 
and finished editing the file (unloaded plugin)  by adding image etc and saved it again , then reload plugin,

* because of keybind issues i cannot fully edit the kit in chat so have to open the data file to complete the setup, you might not have that issue, if you dont,  you dont have to unload the plugin when editing it in chat

After that i redeem the kit to check it

I'm fairly certain the problem is a result of some of the skins I was trying to use are no longer available on the Steam Workshop. I'm just going to recreate all of the kits from scratch. If that doesn't work I'll just switch to a different plugin; the dev of this one obviously doesn't give a crap about supporting his work. He's ignored allposts and messages from me.

Merged post

well, i reinstalled the plugin and created a few kits using absolutely no skins. i tested the first kit and was able to redeem it just fine. i added 2 more kits and tested again and got the file does not exist for every kit including the first one that originally worked.