Importing photos from hard drive, the dropdown arrows have disappeared in the source section.

[Lissa-Photography]

Importing photos from hard drive, the dropdown arrows have disappeared in the source section. Which means I can't open the subfolders individually. Even when I select 'include subfolders'.

On the import section of Lightroom.

When I select my external hard drive as the source. It doesn't show me the subfolders even when I select 'include subfolders'. 

The little grey arrows that I normally click which dropdown to see the folders within folders have disappeared.

Please help!

I am running:
Lightroom Classing version 11.2
Macbook Pro M1 - MacOS Monterey version 12.0.1

[JohanElzenga]

Try resetting the preferences: https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/

[GoldingD]

An odd possibility, change the method from Add to Copy, now look at the Destination, is the current destination valid? LrC has a occasional problem where if the previously used Destination has been deleted/renamed/etc, LrC fails to note that until you attempt the import. And this can foul the Add method up even though that destination is not involved.

No, not logical, makes little sense, but give it a look.