Maybe also nesting issue?

[colrobloxkid69420]

This is seemingly a separate issue from the previous one by my friend. I wonder what is causing this.

[colrobloxkid69420]

I just realized it needed to be "->E 11,16" in 19 here, so here it is fixed. (the problem is there, it's just that I made a small mistake in recreating it. you can see that it gives the wrong error: "unavailable" and not "incorrect use")