Luc4

@Simon Wei This solved the issue for me, thanks!

I encounter a bug in the Affinity Publisher Beta 1.7.0.312 while changing colour profile of a document to RGB/32. If I select a RGB/32 profile when creating a new document, it works fine. But if I change the colour profile (under "document setup...") on an existing document (even an empty one with colour profile RGB/8), then the software crashes. Strangely, if I create a document with a RGB/32 profile, change the profile to a RGB/8 (click ok) and then change it back to a RGB/32, it works ok.