Error when used with PW v2.5.3

[evanmcd]

I get this error when hitting the /setup/selector-test/ page.

Error: Call to a member function getArray() on a non-object (line 700 of /Projects/asa_asa.orgrebuild_14-asa-058/Develop/Source/site/modules/ProcessSelectorTest/ProcessSelectorTest.module)