Connection timed out after 5001 milliseconds Operation

[ Moved to the Fixing WordPress sub-forum. ]

I visited a page on my site today and the following warning appeared at the top:
“Connection timed out after 5001 millisecondsOperation timed out after 0 milliseconds with 0 out of 0 bytes receivedConnection timed out after 5001 millisecondsFailed to connect to www.yummly.com port 443: Connection timed out”

It disappeared after I refreshed the page though, but I’m concerned, especially the site it was trying to connect to which I highlighted in bold.

Can anybody enlighten me on what may have caused this, is there anything to be worried about?

My site URL is https://www.naijaandroidarena.com/
Thanks.