In addition, when I try to reinstall the plug-in I get this notice:
Installing Plugin: The Events Calendar
Downloading install package from https://downloads.wordpress.org/plugin/the-events-calendar.4.5.9.zip…
Unpacking the package…
Installing the plugin…
Destination folder already exists. D:/REX.WordPress/travelguide/wp-content/plugins/the-events-calendar/
Plugin install failed.