Error message while deleting from a group without authorization has an html number of a single quote

Pre-conditions
User should have Admin permissions
Steps to reproduce
1. Open "Users" page and search for any existed user with groups
2. Open groups multi select box
3. Log out in another tab
4. Delete any group
Actual result
Error message "We& # 3 9;re sorry! The server encountered an internal error or misconfiguration and was unable to complete your request." is shown ("& # 3 9" without spaces)
Expected result
Error message "We're sorry! The server encountered an internal error or misconfiguration and was unable to complete your request." is shown