I'm getting the exact same pop up as pictured above..only on my ipad w/safari browser, and only on QB. I'm also having the site dropped... "an error occurred and the site is being reloaded"--this over and over until in frustration, I shut down. Again, it has only occurred on QB. Last evening the site was dropped several times and message was ''error 404/url vstsl (I can't remember all the letters)...does not exist." As if I had tried to go to another site. After 4 times, I shut down.
I spoke w/ a friend at dinner about whether I could have malware or virus in Apple product...she said "absolutely--I just pd $150. to have virus removed from my MAC". So, now I don't know what to blame it on.