This event doesn't exist but it shows a 403 error instead the 404 error.
In these pandemic days, there are a lot of cancelling events and for Google:
Access denied errors often take the form of a 403 Forbidden response code. When Google returns this error it generally means that the websiteâ€™s server or host is blocking Googlebotâ€™s access. These errors are bad for SEO because the search engines canâ€™t crawl that page. If the error isnâ€™t fixed after a certain period of time Google may just de-index the page entirely.