Error executing menu with Python script

Hello,
I am getting this error message while executing menu Python script. I am unable to open the existing file as you can see on the message. I have searched for the solution but I can’t resolve this issue without your help. Please help me to fix this issue. Thanks in advance.

An error occurred while executing menu Python script.
Could not open file C:/PROGRA~1/Side
Details: Could not open file C:/PROGRA~1/Side
