Type error in loading qCumber

Hi
I am trying to load the qCumber libraries into my q instance but get type error

Any pointers ?

Kdb version - 4.0 2021.02.02
KX Developer - developer-1.5.4-linux

Starting qCumber: q test runner

q)Error: type
[kdb@wtfxld7app09 developer-1.5.4-linux]$