Also in 5.9.1 and 5.10 when you try and set up a localhost client server you can’t enter a command into the server setup dialog without ParaView instantly crashing…on both Windows and Linux.
This issue has been fixed already in master and will not be present in ParaView 5.10
I had to write an external batch/bash script to start a server and automatically connect to it. The files then read in successfully.