Kruscal-Wallis menu crashes

[AlfCano]

When selecting Teaching -> Non parametric tests -> Test of Kruscal-Wallis,
The dialog box wont open (crashes) with:

El motor QtScript ha informado de un error:
Script Error in file:///usr/share/rkward/phpfiles/common.js, line 31: TypeError: Cannot read property 'noquote' of undefined
Backtrace:
quote@file:///usr/share/rkward/phpfiles/common.js:31
makeHeaderCode@file:///usr/share/rkward/phpfiles/common.js:91
@file:///usr/share/rkward/phpfiles/common.js:113
printout@file:///home/cano/R/x86_64-pc-linux-gnu-library/4.2/rkTeaching/rkward/plugins/non_parametric_tests/kruskal_wallis.js:68
do_printout@file:///usr/share/rkward/phpfiles/common.js:178
%entry@:1

Any help will be appreciated,
Thanks for your time and work.
Greetings
Alfonso