Describe the bug
This error, “Uncaught Missing instance data for this datepicker” appears on the console when navigating through pages where the plugin is not active, like homepage, product pages, etc. It also causes a plugin conflict situation with other plugins.
The only way to clear this error at the moment is to disable the plugin.
oluisrael11
commented
5 months ago 
Describe the bug This error, “Uncaught Missing instance data for this datepicker” appears on the console when navigating through pages where the plugin is not active, like homepage, product pages, etc. It also causes a plugin conflict situation with other plugins.
The only way to clear this error at the moment is to disable the plugin.
Additional context https://wordpress.org/support/topic/uncaught-missing-instance-data-for-this-datepicker/#post-17510867