Cannot place this file. Invalid PNG file
In 15.0.3, my publication was print ready
I updated to 15.1 as I normally would.
In 15.1, particular .png files were missing. I tried to place the missing images as usual but got the error - Cannot place this file. Invalid PNG file'.
I rolled back to 15.0.3 and am now able to place the self same files.
The fix is now publicly available in the latest InDesign update, 15.1.1
Please update to this latest version to get the fix.
Adobe InDesign team
Pirabu Chandran commented
No, we still have the same bug even after 15.1.1