Using Search Query tool against our SharepointOnline Tenant
When doing against "normal" Document Results, everything is fine. When searching for Persons, I also receive the results. However, the "Title" is empty, and the buttons for "Managed Properties" and "Crawled proerty names" result in an error message and then the tool crashes:

This happens only when doing person search
Using current version 2.9 on Windows 10.
Maybe you can help?