Skript 2.5: Skript throws error when attempting to repair item

### Description
Repairing an item of any type in any slot of a player will throw an error.

### Steps to Reproduce
```
command /rep:
	trigger:
		repair held item of player
```
### Error
https://pastebin.com/u7F4iJX7

### Server Information
* **Server version/platform:**  1.15.2 / Paper 112
* **Skript version:** 2.5-alpha1 (not present on 2.4.1)