Can't copy photo from IPad
This seems unusual if you can reproduce this after holding the power buttons and then sliding to turn off the iPad. 

Which application is this failing once you restart cleanly? Safari or Notes app ar good to check. Also, make sure it’s not text copy and just photos. 

Sorry I don’t have an absolute fox, but since you didn’t mention and troubleshooting I figure I can help with some things to start with.