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.
- Navigate to Setup > Debug Logs > New.
- Select the user who authorized MDA, and select the debug level as SFDC_DevConsole (which will be available by default).
- 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.