# Troubleshooting Favvy
# Your selected layer must be a square
Favvy will let you know if you've selected a layer that isn't square; this can be resolved by resizing your frame until the width and height are identical (eg. 512x512).
# VPN may be required in China
Please note, if you're in China, the license server may be blocked by "The Great Firewall of China". If you're seeing a license error, despite using a valid key, you will likely need to use a VPN to resolve the issue.