Error 21: undefined is not an object

[Pixel-Sallo]

Hi, I'm using PS 24.5.0 on a M1 Mac.

Everytime I like to save an image (Ctrl + S) I get this error. The image will be saved, but I get this every time. I'm not shure, maybe since I installed the beta of PS. Now the beta is uninstalled.

Does anyone have an idea?

Thanks, Stefan

[Rick Adams]

May I ask how we are to find where you moved this if you don't provide a link to the new location?

[elisabethm83122842]

All of a sudden, I am having the same problem. 

When I am in LR and click on "open image in PS", PS will open but the image isn't showing up. Only way to open is when I open it as a spart object. 
Then when I try to save it back into LR, it won't show up in Lightroom. UGH! I updated a week ago or so and the problem just started

[artkeh]

Spoke too soon. Downgraded to 24.6 and the problem went away. So on a whim, I tried upgrading back to 24.7 and sure enough the problem was gone...so I thought. After several weeks error-free the error is back again. So annoying! So I guess I have to keep reinstalling every few weeks? PLEASE fix it!  

[Peter Morlor]

I updated PS to 24.7.0 today, and then I noticed that I could not save my files as I usually do (from Lightroom to PS and back again).

When I use the shortcut command S I get the error message Error 21- undefined is not an object.

I'm on a Mac M1 - Ventura 13.3.1(a)

Does anyone else have this problem and know a solution for it?

[artkeh]

I don't know if this is a solution or just a coincidence. But, the problem kept returning for me with every new PS update. Then I read somewhere someone mentioned something about having this issue when using the 'Edit In Photoshop' feature in Lightroom, which is what I do, too. So I tried opening a file outside of Lightroom and didn't have the problem. At that point, I realized I had 'Maximize Compatibility' turned off. I turned it back on and haven't had the problem since. For anyone having this issue, try turning Maximize Compatibility on and see if it solves the problem. It's worth a shot if nothing else works.