The Standardizer node presumably requires a license?
Yes, you need a license for the JChem Extension nodes.
(opposed to the Marvin nodes which are free)
However H removal and some other simple actions do not need an additional Standardizer license.
Some Standardizer actions ("aromatize", "aromatize:b", "dearomatize", "addexplicitH", "removeexplicitH", "wedgeclean","convertwedgeinterpretation") do not require a license key: standardization composed of these actions only can be run unlimited even without license.