Heating coil water inlet/outlet error [closed]

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I'm modeling a college building in OpenStudio for energy audit purpose. I ran the model simulation and got the following error:

IP: IDF line~34021 Error detected in Object=COIL:HEATING:WATER, name=COIL HEATING WATER 15 Field [Water Inlet Node Name] is required but was blank
IP: IDF line~34022 Error detected in Object=COIL:HEATING:WATER, name=COIL HEATING WATER 15 Field [Water Outlet Node Name] is required but was blank

I searched on this forum and found two similar questions:

• OpenStudio Air Inlet Node Name Missing
• water inlet-outlet node/IDF version error

I looked through the answers and realized that my case was a little different. In the Hot Water Loop, I can see all the heating coils attached to the water loop. And the following is the screenshot of the hot water loop. Most of the air loops are VAV without reheat.

Screenshot and Model file

I checked the air loops and searched existing posts but still have no idea about it. Does anyone have this kind of problem before? I appreciate any help that you could offer.