When users deletes a page I get and page saying that I should wait until
page is deleted. I check browser console and I see 500 response from xwiki
and nothing happens. If I go to some parent page, I see that page is
deleted. Checked xwiki log and see an exception:
https://gist.github.com/edvorg/9519c5055011ecdb319f6dcbdee39a76
does anybody know why could it happen?