Nope, this is a bug with Code insight. It looks like when the dropdown is
invoked in a comment, then this error occurs.
The good news is that this error is harmless and there are things you can do to
avoid it. According to the text in your editor, it looks like you may have
invoked code insight with ctrl+t. The other way it can be invoked is by typing a
period and waiting about a second. If you just avoid using code insight in
comments, you should no longer get this
Go to options > Editor > Code Assist
There is a setting in there to set your pop-up delay, you can set that higher.
If you’re not using Code insight at all, you can turn it off by unchcking
“enable Code Insight picklist”