Problem with LR catalogue not opening on desktop

[default437sr3chqmcb]

Hi!  I have a LR catalogue (saved on an external hard drive) that opens on my laptop but when opened in LR on my desktop says files cannot be found.  Both LR are up to date.  I have done this multiple times where I edit on both devides and this is the first time I've had this issue.  Not quite sure why it won't open on the desk top!  Any ideas?

[Sean McCormack]

It may be a preferences issue on the Desktop if it's a recent thing. 

https://helpx.adobe.com/ie/lightroom-classic/help/setting-preferences-lightroom.html

Make sure to back up as described, as if it doesn't solve the issue, you may want to restore the file.