Issue Running Project After Updating to Version 15.81 – NameError

I am currently using Test Complete version 15.76. After updating to version 15.81, my project encounters the following issues when running:
Name Error: name 'Sys' is not defined
Name Error: name 'Log' is not defined

My project uses Python as the programming language. It runs correctly in version 15.76, but I would like to use the newer version to take advantage if its improvements.

Could you please provide guidance or support to resolve this issue?

Thank you for your help.