Images missing from upload to Lightroom?

sarahmariehawkins  wrote I recently shot a wedding this past Saturday. I am currently trying to upload all of the images (all are on one card). I started the normal upload and only 1416 of 2000 are uploaded. When I go to develop photos nearly 600 are missing. I returned the card to my camera and all the images are there. When I inserted the memory card back into my computer to upload the remaining images to Lightroom it would not allow me to upload any. It shows that they are all uploaded. But when I look at the folder only 1416 are there and I can only develop those 1416 images. I am not sure what to do to get those missing images from the  card to the lightroom folder. Please advise. ps. They were all shot on the same canon camera and are all csr images.

What is the version number of your operating system? We need the version number and not words like "latest" or "up-to-date":

If it is a Mac, this has been reported many times recently, and you should file a bug report at Lightroom Classic CC | Photoshop Family Customer Community​, or add your comments to an existing bug report on this issue.

Try creating a new folder

Copy the missing images from the card into the new folder

Then import into Lightroom using "Add" rather than "Copy" and choose the folder in the left hand panel of the import dialog.

Your use of the word upload as opposed to import makes me ask what version of Lightroom Classic cc?