If you purchased your Affinity app through the Mac App Store you may see the error Failed to Open File when trying open a document into the app. You may also get the error Failed to Save Document when trying to save or export a document from the app. You may also notice the app taking several minutes to load. This issue is caused by using a Font Manager to activate a large amount of fonts and Sandboxing. Any app purchased through the Mac App Store will be Sandboxed. Sandboxed apps are desig