Scanner error - Failed to open a connection to the device (-21345)

Thank you , it worked for me

I Have the same issue with my Epson Artisan 810.

M4 iMac, Sequoia 15.3.1.

In Local Network pane, no printer or Scanner app and no way to add it.

(no plus or - sign to add or delete)

Any help appreciated.

SOLVED:

Close all open apps.

In the Finder Menu Bar, open Go > Go to Folder…

In the pop-up field that opens, type /Library/Image Capture/Devices and hit Enter.

Double-click the app that was listed in the error. Nothing will happen, and that’s normal.

Close the window and scan again. Now everything will work properly, at least for some time.

I also rebooted both iMac and printer.

Now it works, but still do not know why the printer or ImageCapture app does not show up in Local Network pane

only3u

Thanks so much. This solved the problem with a Brother printer.

Worked for me too after a lot of frustration adding wired/not wired connections to a Brother printer

Thanks, it worked for me HP deskjet !

Thank you very much. The device not work since a long time and you help me.

Thanks a lot, your advice was successful! After searching and searching.

The problem is produced by Apple dev's itself. More and more bad programming! They should think a bit more about their users. You cannot leave the decision to the users without also explaining the consequences of the decision.

Very bad management by Apple managers - come back to the ideas of Steve Jobs ! His goal was always a user friendly system !

This worked for me:

1. go to the System Settings:
2. Click on Privacy & Security
3. Click Local Network
4. Enable the printer / scanner that was throwing error.

It didn't work for me. I had HP Scanner there but it was already on.

Thank you. This was driving me crazy … Brother support didn’t tell me about this setting.

It worked after I changed the setting that you so clearly listed.

Thank you very much.

Fantastic. Thank you!