XSRF Token Interceptor fails with NoSuchMethodException for constructor-injected plugin actions

	<xwork name="Custom Attach" key="custom-attach">
		<description>Provides custom attach file action that works with Crowd's SSO.</description>
		<package name="custom-attach" extends="default" namespace="/screensnipe-custom-attach">
			<default-interceptor-ref name="validatingStack"/>
			<action name="attach-file" class="com.screensnipe.confluence.atlassian.CustomAttachFile">
				<result name="input" type="json"/>
				<result name="json" type="json"/>
				<result name="error" type="json"/>
				<result name="notpermitted" type="json"/>
			</action>
		</package>
	</xwork>

java.lang.NoSuchMethodException: Unable to load action: com.screensnipe.confluence.atlassian.CustomAttachFile
	at com.opensymphony.xwork.config.entities.ActionConfig.getMethod(ActionConfig.java:115)
	at com.atlassian.xwork.interceptors.XsrfTokenInterceptor.intercept(XsrfTokenInterceptor.java:78)
	at com.atlassian.confluence.xwork.ConfluenceXsrfTokenInterceptor.intercept(ConfluenceXsrfTokenInterceptor.java:25)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.security.interceptors.CaptchaInterceptor.intercept(CaptchaInterceptor.java:46)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:35)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.util.LoggingContextInterceptor.intercept(LoggingContextInterceptor.java:49)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)
	at com.atlassian.confluence.core.CancellingInterceptor.intercept(CancellingInterceptor.java:23)
	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:165)

[INFO] [talledLocalContainer] java.lang.InstantiationException: com.screensnipe.confluence.atlassian.CustomAttachFile
[INFO] [talledLocalContainer]   at java.lang.Class.newInstance0(Class.java:340)
[INFO] [talledLocalContainer]   at java.lang.Class.newInstance(Class.java:308)
[INFO] [talledLocalContainer]   at com.opensymphony.xwork.ObjectFactory.buildBean(ObjectFactory.java:97)
[INFO] [talledLocalContainer]   at com.opensymphony.xwork.ObjectFactory.buildAction(ObjectFactory.java:77)
[INFO] [talledLocalContainer]   at com.atlassian.confluence.plugin.ConfluencePluginObjectFactory.buildAction(ConfluencePluginObjectFactory.java:60)
[INFO] [talledLocalContainer]   at com.opensymphony.xwork.config.entities.ActionConfig.getMethod(ActionConfig.java:112)