Lightroom classic cc v7.4 unable to export photos because "photo does not exist on disc

A couple of reasons that this might occur are

1.  the image is not in it's original location and Lightroom can't find it to export it

or

2. the permissions to where you want to export the file to won't allow you to write to that location.

Can you upload a screen shot of the library grid view with the image selected and both right and left panels showing?

Have you quit and reopened Lr since this issue showed up?

As a test, can you select the image and export it again to your local drive - you can delete it after.

ianc49486811  wrote Whenever i try to export this image it wont export because of this error what do i do?

Click on "Show in Library". Does the image have an exclamation point icon or a question mark icon, as shown in Figure 2 here: Adobe Lightroom - Find moved or missing files and folders

If so, follow the directions given to fix the problem.

You can try exporting as a DNG.

Is your Olympus on the list of supported cameras?

Cameras supported by Camera Raw