It was explained to me like this. Way over my head too! LOL!
"These (the errors) are caused by scripts, especially due to how they are executed. If the script contains in his code any suspend command like sleep, waituntil, sleepUI and other it cant be called. You need to spawn it. Spawned code running in scheduled environment and only there you can suspend executing the code."
Basically, in the Intel/fnc_handleKilled.sqf he's saying you need to use "spawn" instead of "call." I think! :)
Yeah. I know. It's all a foreign language to me. I was asked not to share the PM I got from him unless I generated a full report myself. Seeing as you generated your own, I can PM it to you on BIS if you want. He included some nifty links that may be useful.