affinity publisher problem on Mac, cannot export all pages as pdf

[am-orangebox]

I can export 'current page' and then put them alltogether as one PDF using 'preview' on my iMac, but this is obviously not as quick as being able to export 'All Pages'. I am using Publisher 1.7.1.

When I try to export 'All Pages', on selecting the folder I want to save into, I get the same error message as earlier versions of Affinity Photo and Design, window opens 'Allow access  to the folder to export multiple files'.

Apart from the above issue, so far, I am finding the Affinity Publisher App is brilliant for brochure design for web and print (previously used QuarkXPress for many years), very pleased with it.

[am-orangebox]

I confirmed a setting for 'global' permissions in a publisher window that came up today - this request to set permissions was stopping me from working on the file that I set up a few days before. Don't know why this request came up today (the publisher message said something about not having permission to access the linked images.) 

I copied some files from my iPad yesterday, maybe this altered something? Anyway I changed a setting in iTunes re sync to this device and also reset my user permissions on my iMac.

Getting back to my Publisher job, 4 page brochure, I was able to export 'all pages' to PDF. 

Big relief!