Error in change calculations!

I got this error msg (Error in change calculations!) in ERPNext Version 12 (POS Awesome).

Could you please guide me how to fix it?

Thank you so much.

System Info:
ERPNext: v12.27.0 (version-12)
Frappe Framework: v12.24.0 (version-12)
POS Awesome: v2.0.1