Cannot search resources in advanced filter

Hello,
When I try to search a resource in advanced filter, I cannot get the list. I have reproduced this error in the demonstration version (demo.projeqtor.org).

The way I did it:
- In the "affectation" window, I open the advanced filter menu, and then select "resource"
- Since there are many resources, I click on the search button: the list is blank ; the title that appears is [menuResourceSelect]
- this action breaks the connection
- the error I get :REQUEST_URI = /tool/jsonQuery.php?objectClass=ResourceSelect&objectType=&objectClient=&budgetParent=&objectElementable=&comboDetail=true
Any idea?

Thanks in advance,