From both a Windows 2016 master and a REL 7 master servers running version 188.8.131.52. I tried editing a VMware backup policy.
I select a line in query to edit and press edit. Then I select a client, data Store or etc to add
I press the save button and get pop up window titiled Query Builder with message URL should begin with vmware:/?filter=
I found a workaround
1) open policy
2) Select Client tab
3) Select first line vmware:/?filter=vCenter Equal "Vcenter01"and press edit
4) immediate save and first line is updated to vCenter Equal "Vcenter01"
I was then able to edit any addition in the query and save without problems
But each time I go into edit policy I need to save first line to remove vmware:/?filter= before I can edit any additional line in query