Hello.
More details are needed my friend.
You're using WinBuilder 076 which is good because it is the latest version, however, we need to know what project you're trying to build since this is obviously a bug related to some project and not directly related to winbuilder.exe
Also, we need to know which script is giving the error, which version of the script you are using, a whole lot more of details that probably seem redundant but are definitively important to help us understand what you're trying to do and what might be going wrong.
Therefore, please repeat the build process and at the log tab press the "Save as log.html" button to export all these details about the project you're trying to run.
Then you can zip this log.html and upload it somewhere to a temporary file host so that other developers can take a look.
Otherwise, it's impossible to know how to fix this.