The documentation for the shell plugin, ns.col2.extra, was malformed.
The errors were:
5 validation errors for PluginDocSchema
doc -> options -> remote_tmp -> env -> 0 -> extra
Extra inputs are not permitted (type=extra_forbidden)
doc -> options -> remote_tmp -> ini -> 0 -> extra
Extra inputs are not permitted (type=extra_forbidden)
doc -> options -> remote_tmp -> vars -> 0 -> extra
Extra inputs are not permitted (type=extra_forbidden)
doc -> options -> remote_tmp -> extra
Extra inputs are not permitted (type=extra_forbidden)
doc -> extra
Extra inputs are not permitted (type=extra_forbidden)
File a bug with the ns.col2 collection in order to have it corrected.