When I load Arma 3, it has now started giving me an error of;

"Script \FIR-AV8B\sqs\init\loadattribute.sqf not found"

I have tried unsubscribing, then reloading Arma 3, then coming back to the launcher and checking the mod was "installed" after I subscribed again.

I have also checked the folders in the Arma 3 directory to make sure all the PBO's are showing, and it all shows fine.

If I try and load a mission with the Harrier in it, it just fails to load the textures or the aircraft at all, any idea's what I can do to fix this?

Since I have missions with Harriers in them, it used to work perfectly like every other addon, but for some reason it is now giving me the above error...

Every other one of your planes I have installed works perfectly too, just the Harrier has this issue...