google-plus
Whenever I try to change my cover photo on Google+ it just says:
There was an error changing your cover photo. RETRY
As I recall I had the same problem about a month ago when I tried so it appears to be permanent. Do I need to contact Google themselves or might there be a workaround of some sort?
Error occurs regardless of which image I try to use.
You can do this by:
Photos sections
Your albums
Edit link
Edit link and a popup will appear where you check/amend the visibility.
There is no option to remove it. You can re upload the original photo
https://ssl.gstatic.com/s2/oz/images/profiles/defaultimage_bluegreen_940x180.png
Here it is before
And After
The photo realigns perfectly
Best Answer
I guess that image you are trying to upload from your device or from Google Photos is not in a compatible format or size to use as a cover photo.
If you think you are using correct image, just give a try with another browser or clear the cache of you current browser and try to change cover photo again.
Here is a non official site which explain the size of cover and profile photo of Google+.