Not sure if anyone else is seeing this issue, but we just upgraded to 11.3.0 and when selecting "Project Settings" and "Information", we receive the following error:

We confirmed this on multiple desktops.

It only appears to occur on the "Information" menu item.. all other "Project Settings" elements appear to work fine.

Bug report: 
https://community.openproject.org/projects/openproject/work_packages/details/37577/overview

Hello John, 

Thank you very much for reporting this bug! 
The state of the fix will be tracked in OP-8770.

Kind regards
Samantha