P: Photoshop 27.4 (GA) Export As says "An unknown error occurred."

For me it was the same, I just rolled 2 updates back to 27.3 and it works fine, the 27.3.1 update and 27.4 this feature does not work no matter what I did, and if you turn off legacy export you wont get the same options as here, even the quality preview is terrible. If you insist using the export in 27.4 then from preferences export turn off legacy export and you will get and export screen similar to this one.
Hope this helps:)

i have the same problem after update to 27.4.0

Hi ​@markusk96044643 

Sorry to hear about your experience. I tried replicating the issue on the English version of Photoshop on a Windows machine, and it worked as expected.

To investigate this further, could you please share the following details:

• System Info from Photoshop (Help > System Info > Copy-paste details here)

• A full-screen screen recording of the issue, including the options you are selecting.

• Whether the issue occurs with a specific file or with multiple files, including newly created ones.

• The location where the exported files are being saved (e.g., external HDD, network location, or company server).

Once we have this information, we’ll be able to assist you further.

Regards,

Srishti

Since updating to the last version (including Camera Raw) Photoshop’s legacy export as function stopped working.
The default fast export option (e.g. png) seems to work, however when swichting to jpeg it errors out with an unknown error.
The button leads to a 404 page with the following URL:
https://www.adobe.com/404.html?gourl=extract_assets_tips_en

Hey, ​@Shay_HCL. Welcome to the Photoshop Community. I’ll help you figure this out. Please share a video of the issue and the system info from Photoshop Help > System info. Copy and paste it into a text document, then upload and attach it here.

Does this happen with any document with fewer artboards? By looking at the screenshots, you’re working on a few active Artboards. Where is the original document stored? Have you saved the document at least once while working? 

Let me know how it goes. Thanks!

Thanks!
Sameer K 

(Type '@' and type my name to mention me when you reply)

If it were an isolated thing that affected only one or two people that would be different

Well, it sort of is, I haven’t heard of this happening more than perhaps a couple of times in later years.

It sounds to me like corrupt preferences. Moving the whole Adobe Photoshop 2026 Settings folder to your desktop is the safest and most effective ways to do a complete reset. This will return the application to clean out-of-the-box factory state. Make sure to save out all your custom actions, brushes etc first; they will be wiped.

Corrupt preferences can cause inexplicable behavior that usually looks like application bugs. Preferences contain a lot more than your own user settings, it’s the whole application configuration. They are vulnerable to corruption because they are rewritten on every application exit, so small errors accumulate, especially if you migrate from previous versions, and irregular shutdowns can corrupt them.

The path to the settings folder is (system) > users > your name > appdata > roaming > Adobe > Adobe Photoshop 2026.

I updated photoshop to 27.4.0 last night before going to bed. This morning I attempted to use photoshop. I need to export a file as a jpg. I click on quick export as jpg, it opens the save dialog like usual, and everything seems normal, EXCEPT, there is no jpg exported. I try it again and again and get the same result. So I try export as, the dialog comes up and it defaults to png, I change it to jpg in the dropdown menu, the little busy icon shows briefly and then the dialog options all go blank and an error message pops up. I try it again, same results. I close photoshop and open it again and the same results. 

My question(s) are: When is this going to be fixed? And how do I get a refund for the time that this program is not usable because of the sloppy work by adobe’s so called “engineers”???

Why can’t these people test this stuff out and ensure that everything works? If it were an isolated thing that affected only one or two people that would be different, but every time it’s always the same, the BUGS affect virtually every user. Adobe should be forced by law to have to pay for it, then they would stop putting out half baked junk that doesn’t work correctly. 
 

I tried this in PS 27.4 and I worked ok. In your screen capture, it appears that there is no image/data in the Source panel on the Left. The error message agrees with that: “No Valid Asset...” In other words, blank.