When opening certain PDF files using the in browser PDF viewer (Adobe engine) the save button is greyed out, also it tends to be when this message is displayed "This document is digitally signed. Some signatures couldn't be verified."
Windows 11, Edge 128.0.2739.42, works fine in Chrome
Example document link, https://assets.publishing.service.gov.uk/media/60b74244e90e0732b2acacb6/PA15_0421_save.pdf
Any ideas?
