Could not complete the Render Video command because of a program error ?
Now I can export > render Video > Adobe Media Encoder ..... but I can't Export image sequence (PNG) 
Now I can export > render Video > Adobe Media Encoder ..... but I can't Export image sequence (PNG) 
Hi
This is a known issue in the current version of Photoshop. Adobe staff are aware.
See this link for more detail:
Photoshop CC 2018: PNG Image Sequence Export Not Working | Photoshop Family Customer Community
In the meantime if you need PNG export you can re-install CC2017 from the desktop app (older versions can co-exist on the same PC) and use that when you need to render the PNG image sequence.
Dave
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