System error alerts from ujokegimi.sbs.

Once I turned off Safari notifications for that website, the warning stopped appearing so I can't take a screen shot.

You probably ought to describe what you're encountering in greater detail. A screenshot would be most helpful.

Writing an effective Apple Support Communities question - Apple Community describes how to capture, edit (if necessary) and upload screenshots to this site. Please don't capture any information you might consider personal (names, email addresses etc).

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Stop unwanted Notifications - Apple Community describes those annoyances and what do to about them.

Take a screenshot. Post it. If the statement is not appearing any more then there is nothing else you need to do.

There is nothing to take a screen shot of. It's just the statement above.

I followed instructions and stopped notifications from Safari but wonder if anything was put in my system,