RelativeResize does not work

[Belgacem-TLILI]

if i use this configuration i get picture with 120*90 size
avalanche_imagine:
filters:
my_thumb:
path: uploads/cache/
type: thumbnail
options: { size: [120, 90], mode: outbound }

but i need to use relativeResize filter with the next config , i dont get picture generated
avalanche_imagine:
filters:
my_thumb:
path: uploads/cache/
type: relative_resize
options: { widen: 100 }