New post processing in plug in failures

I use Lr/photoshop. I have skylum 2019 as plug in. I updated mac book pro yesterday to Catalina and also altered Lr to Auto write changes into XMP.

Today I imported as usual into Lr, quick work and used plug in luminar (as usual). But after processing Luminar was unable to save? It usually saves changes,closes down and image is then in Lr with luminar changes.

Today images once had changes done, Luminar could not save the changes1

Any ideas please?

I've solved the issue ~ I've just noted in Luminar that I'd missed an update. Updates are not automatic, and with a new version about to be released I'd thought an update improbable - well I was wrong and the Luminar update resolved the issue....a learning curve:)