Hi @4colordesign !
Are you receiving this error message with our plugin activated? If so, on what screen? This error was resolved a few months back on pages like the Widgets edit screen, so re-installing our plugin should solve it.
After re-installing the plugin (deleting then re-adding), if the error is not resolved, you can test that another plugin or your theme isn’t causing an issue with the following steps:
1. Ensure you have a backup of your site in case there are any issues when disabling/enabling plugins or your theme
2. Disable all plugins (except your calendar plugin and this plugin), and switch to a default theme like Twenty Twenty then verify the issue is resolved. You might need to add the shortcode to a new page if you’re currently using a page builder.
3. Re-enable your plugins and switch back to your previous theme one by one verifying if the issue is still occurring, and note which one causes it to break
If you let us know which plugin/theme causes the issue we may be able to come up with a workaround, but most likely you’ll also need to contact the theme or plugin author and have them fix the issue.
Cheers!
