Getting error message in Finder after upgrading to macOS Sequoia

I am also getting the exact same error message since upgrading to Sequoia. I also work for the NHS and get emails from NHS Executive (info@Information.nationalhealthexecutive.com) as described later in the thread here. Moving the email to the bin and then back again into the inbox triggers the pop up so it must be something in the email triggering it. I have emails set to not load content directly in privacy settings but disabling this has no effect on the pop ups. I will block the sender of the email and unsubscribe to the emails in the hope that this solves it, but if anyone knows why this is happening it would be useful to know just in case I need to resubscribe to this NHS news letter in the future. Thanks. Just like, Michael this has been driving me nuts as its really inconvenient when sharing your screen during a teams presentation to have these randomly appear for all to see

Looks like you have some malware that got installed. Try running MalwareBytes to see if that removes it for you. After running MalwareBytes, you can uninstall MalwareBytes since there is no reason to keep it running.

https://www.malwarebytes.com/

I have been having this happen, too, and it's been driving me nuts. Given this clue, I looked at the HTML in emails that I've recently received (open the email, choose View/Message/Raw Source from the menu bar). Sure enough, I eventually found this:

<grammarly-desktop-integration data-grammarly-shadow-root=3D"true" style=3D=
"text-size-adjust: none !important; -webkit-text-size-adjust: 100%; -ms-tex=
t-size-adjust: 100%;"></grammarly-desktop-integration><iframe id=3D"Fg9LJVx=
i" frameborder=3D"0" src=3D"chrome-extension://ekhagklcjbdpajgpjgmbionohlpd=
bjgc/translateSandbox/translateSandbox.html" style=3D"width: 0px; height: 0=
px; display: none; text-size-adjust: none !important; -webkit-text-size-adj=
ust: 100%; -ms-text-size-adjust: 100%;"></iframe><iframe id=3D"XSaHw3G6" fr=
ameborder=3D"0" src=3D"chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/=
translateSandbox/translateSandbox.html" style=3D"width: 0px; height: 0px; d=
isplay: none; text-size-adjust: none !important; -webkit-text-size-adjust: =
100%; -ms-text-size-adjust: 100%;"></iframe><iframe id=3D"kkH9LYZC" framebo=
rder=3D"0" src=3D"chrome-extension://ekhagklcjbdpajgpjgmbionohlpdbjgc/trans=
lateSandbox/translateSandbox.html" style=3D"width: 0px; height: 0px; displa=
y: none; text-size-adjust: none !important; -webkit-text-size-adjust: 100%;=
 -ms-text-size-adjust: 100%;"></iframe></body></html>

It looks like this email includes some HTML tags that on a web page would enable grammarly integration with the Zotero translation chrome plugin, but in Mail cause the "no application found" dialog box to pop up.

Michael9009 wrote:

After upgrading to macOS Sequoia I am getting this error message in Finder.

Getting this error message in Finder when(?) what are you doing or what are you trying to open when it triggers the error?

Command i

Get info will open a file when selected >

if there is no default application selected to open the file then choose one & Change All

Michael9009 wrote:

I did nothing. When I unlocked my Mac Studio this morning, it was there. It also popped up on my Mac Studio a couple of days ago, apparently also without apparent reason.

It was the same in my MacBook Air. I opened the lid recently, and the error messages were there.

There were always two windows with these error messages. These neve appeared before I upgraded to macOS Sequoia on Monday.

You can look at "Login items" in Settings , anything related and remove or disable...

I would recommend you can drill down further with—

Call Customer Support  (800) MY–APPLE (800–692–7753)

or on line  https://getsupport.apple.com/

Outside the USA—Contact Apple for support and service by phone

See a list of Apple phone numbers around the world.

Contact Apple for support and service - Apple Support 

Are you using any third party browsers? Many of them are based on Chromium.

Run the third party app EtreCheck and post the full report here so we can examine it for clues.

I don't know; like you I don't use any Google products, or even any Safari Extensions for that matter. However, I do know that legitimate software makes no effort to obscure itself behind incomprehensible file names like that one. I only mentioned it because EtreCheck categorized it as such.

Often, it is insufficient to merely disable certain software products. To be completely certain it's not affecting your Mac, I recommend uninstalling it, and verifying that is has been uninstalled by running another EtreCheck report.

On that subject, be sure to select EtreCheck's option to allow full disk access. EtreCheck cannot read certain parts of a Mac's system without Admin credentials — a requirement that should always be taken seriously, and if it were not for the fact EtreCheck is a mere information-gathering and -reporting tool that does not alter a Mac in any way whatsoever, I would hesitate recommending that action.

[Loaded] Keepa - Price Tracker Extension - /Applications/Keepa - Price Tracker.app

That would be my first guess. I realize EtreCheck reports it as a Safari Extension but the app may include a component for any Chromium-based browser including Brave.