I take photos on my Android phone and via Onedrive on my Windows 10 (1903) I have no problems importing them into my PSE13.1 (from Desktop). However, I am sent photos to my phone from my family through Whatsap and they are automatically posted to my Photos app. I can seemingly send them by the same route as with my own photos, but when I import them (a combination of photos I have taken and those sent via Whatsap) the only photos visable as actual pictures are those I have taken. Those sent to me appear as what look like a peice of film roll. If I click on that square I get a message saying they are in the wrong file format. Looking at the properties of these individual squres they all end in '.jpg' so I can't see why there should be a problem but there must be a reason. Perhaps someone could please tell me how to overcome this issue.
It's a known problem from Whatsapp (and also FB...)
Those social media add proprietary tags in non standard fields in the metadata header of your jpegs.
The usual workaround is to open those files in a basic editor which ignores those metadata and to resave from the same editors. This will discard the non standard fields and you'll be able to open the jpegs in Elements and other advanced editors.
Another known solution is to open the files in the ACR (Camera raw module) of PSE: File >> Open in camera raw. as if the jpegs were raw files. You can open jpegs, psd and tiff files in ACR, which has a number of advantages. I process nearly all my jpegs in ACR.