lorem ipsum extension does not work (1.0 RC1)

Steps to reproduce:

• open Inkscape
• create text box and activate it, just in case enter one letter to not lose text box
• Extensions -> Text -> Lorem Ipsum
• adjust settings if needed and hit the Apply button

What happened?

Random text was not entered. Also preview didn't work

What should have happened?

Random text entered. Preview also working

Inkscape Version and Operating System:

• Inkscape Version: 1.0 RC1 (AppImage) as 1.0 is not yet available (inkscape#1433 (moved) )
• Operating System: Linux Mint 19.3 MATE, 64-bit