STEPS TO REPRODUCE
- Login as Admin
- Edit a page in-place
- Open the page in another browser or an incognito window
- Login with another user
- Edit the same page in-place
- When the page lock warning is displayed, click 'Cancel' or 'Force editing', or click on 'X' in the upper right
The lock warning box closes, following the chosen user action: 'Cancel' or 'Force editing'.
The lock warning box cannot be closed (unless the page is refreshed). The following error is displayed in browser's console:
The issue reproduces also on 14.1 RC1 and could not be reproduced on XWiki 14.0.