I try to use the phpthumbof modx addon in an getResources template chunk as a snippet, like shown in the code below. But it always gives me back this strange image with its version and the text "error messages disables" in red color and on a violet background.
Here my snippet call:
<img src="[[!phpthumbof? &input=`[[+tv.content__gallery__image]]` &options=`w=100&h100`]]" />