Issue Summary

When trying to copy a page that's on legacy editor, we receive a timed out "The connection timed out. Check you can connect to the internet, then try reloading. If there's no problem with your connection, speak to your Confluence admin."
This is reproducible on Data Center: (yes) / (no)

Steps to Reproduce

1. Have a page with legacy editor
2. Click the three dots and then copy
3. Select a space and parent page

Expected Results

• The page is successfully copied and published.

Actual Results

"The connection timed out. Check you can connect to the internet, then try reloading. If there's no problem with your connection, speak to your Confluence admin."

Workaround

Convert the pages to the new editor to be able to copy them.