Help us help you.
tell us the steps you are doing. Tell us what is happening. Tell us how this is different from what you want or expect. If you can show a screen shot that can explain a lot.
ALWAYS tell us the version of Indesign you are using. We cannot help you if we don’t know what tools or features area available to you.
This may be a Windows problem. I have not seen a folder that InDesign refuses to recognize as such and lets you look inside it. Try dragging and dropping the file using Windows Explorer or Bridge. A PSD would be a better format than a PNG.
What you have there is File>Open
I can tell by the dialog box top of the window it says OPEN
You cannot OPEN images in InDesign
You use File>Place