ParaView Master "Add Range of Values" button in contour is blank

ParaView master from 9/3/2020
Load wavelet source -> apply
Contour note "add range of values" button is just blank

patchett@ganymede:~/projects/pvmaster$ qmake -v
QMake version 3.1
Using Qt version 5.9.5 in /usr/lib/x86_64-linux-gnu
patchett@ganymede:~/projects/pvmaster$  lsb_release -a 
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.5 LTS
Release:	18.04
Codename:	bionic

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information