Unable to save Custom template

Steps to reproduce

• Open Glaxnimate
• Resize the canvas/document.
• From the file menu, choose "save as Template"
• Rename it, and click ok.

Result

Showing error "Could not save template"

Version

Glaxnimate: 0.5.4+win-dc26f367
System: Windows 10 Version 22H2
Kernel: winnt 10.0.19045
CPU: x86_64
Application Qt: 6.5.2
System Qt: 6.5.2
ZLib: 1.3
Potrace: potracelib 1.16
Libav: Lavu58.2.100, Lavf60.3.100, Lavc60.3.100, SwS7.1.100
libarchive: 3.7.1