It may be helpful to enable debug level logs for a specific user while trouble shooting issues in Rules Engine.    

1. Obtain the user's details for whom you need to enable debug level logging.

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  1. Navigate to Setup > Debug Logs > New.
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  1. Select the user who authorized MDA, and select the debug level as SFDC_DevConsole (which will be available by default).
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  1. Save the configuration and execute the rule which is causing the issue in live mode. You can find the debug logs which was created corresponding to the user.
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