It's probably from (older) widgets you have. Check the widgets folder in your project folder.

1. See if there are updates for your widgets

2. For widgets that are no longer supported, either find an alternative or open their .mpk files in e.g. 7-zip, search and open js-files inside and replace logger.debug with console.debug, logger.info with console.info etc.

3. Cosmetic: set Client log node to error level under the advanced dropdown