My copy and paste hasn't been working when I copy from templates and paste to another folder in templates.
Thanks for reporting. We'll try to replicate this issue on our end and get a patch out as soon as possible.
Is this issue happening when you try to copy/paste from a specific template library, or is it all template libraries?
EDIT: I was able to replicate this by having no project open, or by being in a project without any pages. We're working on a fix for this now.
We just deployed a patch for this. If you refresh your page, does it work properly?
It's seems to be working now.