Metabox configuration is required to have an ID parameter

QuestionsCategory: PDF Light ViewerMetabox configuration is required to have an ID parameter
AvatarSteve H asked 2 weeks ago

When I click on the Import PDF link, I get the following error.
“Metabox configuration is required to have an ID parameter” on a white screen. 

I tried deactivating all plugins, but still get the same error.
Please advise.

Using paid Pro version.