Error switching from custom report page to all page rollup

WARNING: /var/www/html/piwik/core/Piwik.php(138): Notice - A non well formed numeric value encountered - Matomo 3.13.6 - Please report this message in the Matomo forums: (please do a search first as it might have been reported already) (Module: CustomReports, Action: getCustomReport, In CLI mode: false)

i was in custom reports on one site, and i clicked the sites drop down to switch to the all-sites rollup site and i got this error filling my screen.

Hi Cory,

Please make sure your Matomo and plugins are at the latest version, let us know if you can still reproduce the error.