Thanking [someone] is an action. -- not working

Authoring Inform 7
1

Laid off I7 programming for several months. Last time I opened and tested my game “Gloryhole” there were no problems. Opened it just now, and a problem showed up that wasn’t a problem before:

Thanking [someone] is an action.

Error message:

In Part - Rooms, Chapter - Parking Lot:

Problem. You wrote ‘Thanking is an action’ : but it is not sufficient to say that something is an ‘action’, without giving the necessary details: for example, ‘Unclamping is an action applying to one thing.’

Because of this problem, the source could not be translated into a working game. (Correct the source text to remove the difficulty and click on Go once again.)

–Wut I be doin’ wrong?

2

I tried ‘Thanking [someone] is an action applying to one person.’

and
‘Thanking [someone] is an action applying to one character.’

but neither worked.

3

Follow the error message.

Thanking is an action applying to one thing.

(The [someone] is a comment and does not affect the validity of the code.)

When you tried “Thanking [someone] is an action applying to one person,” the error message on that also suggested the correct answer.

4

OK, that cleared it up. Thanks [zarf].