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.