Hello there!
So I downloaded and installed your plugin but it seems not to work at all. Here the steps I made:

1. first of all, I didn't changed the *.json file.
2. I gave me a couple of blood bags and tried to do what you said: "left click with the item in your hotbar selected" but nothing happened. In the context menu I can only drop blood bags.
3. I tried to invoke the command /bc craft but it output the message "Unknown command: /bc" (of course I have syringes and bandages)
4. deleted all the files and reinstalled but got the same result aforementioned, without any errors.

(09:08:02) | Unloaded plugin Blood Bags v1.6.1 by Default
(09:08:02) | Loaded plugin Blood Bags v1.6.1 by Default​

This is the json file:

{
  "Blood bags": {
    "Blood bags remove bleeding": false,
    "Can players use the craft command?": true,
    "How many seconds until another bag can be used": 10.0,
    "Instant health to recover": 50.0,
    "Pending health to recover": 50.0
  },
  "Chat prefix": {
    "The chat prefix used for the plugin": "Blood Bags"
  },
  "Crafting": {
    "Amount of item 1 to use": 5,
    "Amount of item 2 to use": 1,
    "First item used for crafting (Item IDs, default value is -2072273936 for bandages)": -2072273936,
    "Second item used for crafting (Item IDs, default value is 1079279582 for med syringes": 1079279582,
    "Time to craft": 30.0
  }
}

Am I doing something wrong?

That's pretty odd, never encountered anything like this before during my testing.

Is this still happening?

I just tested by downloading your update and, alas, still got the same problem.
I checked if all the groups have the permissions to craft them (I have 4 groups on my server) and they have.
Again, I had no error messages in compiling the file on the server.



Feel free to ask whatever information you might need.

To use the blood bags, it has to be in the hotbar, I cannot add the button to use it in the context menu when you click on it in the inventory.

Could you DM me the server IP so I could hop on and check?

I was trying to but....
Sorry, recipient(s) empty or do not accept private messages
Not a big issue tho.
 I was hoping the pictures I put on the forum were visible: bandages and syringes were in the hotbar.

http://www.gilmor.it/imago/rust/screenshots/Clipboard99.jpg​

You can connect here:
145.239.188.162:28015

I am inworld right now, when you will be there I will give you the things you need to craft it.

And thank you for your help! :-)