We have had some reports of SketchBook crashing when accessing the Gallery on Android.
1.Try to reset SketchBook to default. This can be done via: Settings > Apps > Autodesk SketchBook > Storage > Clare Data & Clear Cache. Test SketchBook.
2.Backup your Sketches AND delete the /Autodesk/SketchBook folder.
NOTE: You may need to delete the /Autodesk folder too.
On Android, it's pretty easy, just copy the files from /Autodesk/SketchBook3 and copy it to your desktop computer. You can use the desktop version of SketchBook to complete our work (www.sketchbook.com/thankyou)
To re-import the file, you need to do this:
https://www.sketchbook.com/help/knowledge-base/back-files-settings/
See: How to import SketchBook files from an older version into the latest version SketchBook for Android
See: https://forums.autodesk.com/t5/sketchbook-forum/5-5-2018-update-breaks-new-open-gallery-and-save-and...
3.Uninstall SketchBook and reinstall SketchBook from Google Play.
David Lau