Safari attempts to load a website then shuts it down..ie..eBay
Why is safari opening my website then shutting down immediately and will not reload. Common website such as eBay. This is on my iMac. Thankyou
iMac Pro
Try troubleshooting steps listed in this article.
https://support.apple.com/en-us/HT204098
If this doesn't help, backup first and "Use macOS Recovery to reinstall the Mac operating system".
https://support.apple.com/en-us/HT204904