photoshop error 21 undefined is not an object

[Olena_S8764]

I updated Photoshop and Beta Photoshop. Now, I can't open photo editing from Lightroom in Photoshop—it only opens as a smart object. But then, I get error 21 when saving in Photoshop. What should I do?

[nikunj.m]

Hi, we're sorry about the trouble! Please try uninstalling and reinstalling both Photoshop and Photoshop Beta from the Creative Cloud desktop app, or better yet, after removing both using the Creative Cloud cleaner tool and check if that helps. 

You can check out the steps to use the Creative Cloud cleaner tool, here: https://adobe.ly/43r6jEh

Thanks,
Nikunj