Startup fail on Sandbox

My App did run ok both local and deplayed on Sandbox. Now it fails in Sandbox. I think there is an iaaue with a libary but where to start?   14:27:40 APP INFO AppCloudServices: Starting OpenId handler ... OpenIDReturnURL =; OpenIdProvider: 14:27:40 APP INFO mrt 05, 2017 1:27:40 PM org.openid4java.server.RealmVerifier setEnforceRpId 14:27:40 APP WARNING RP discovery / realm validation disabled; 14:27:40 APP INFO mrt 05, 2017 1:27:40 PM org.openid4java.discovery.Discovery discover 14:27:40 APP INFO Starting discovery on URL identifier: 14:27:41 APP CRITICAL ActionManager: Error in execution of monitored action '{"name":"AppCloudServices.StartAppCloudServices","type":"Microflow"}' (execution id: cb540e40-3217-4baf-94a7-0121dd98faec, execution type: CUSTOM). 14:27:41 APP INFO NoClassDefFoundError occurred for class 'org/w3c/dom/ElementTraversal'. Please make sure the userlib folder of 14:27:41 APP INFO your project includes the correct library which contains this class. 14:27:41 APP CRITICAL ActionManager: java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal
1 answers

Hi Arthur,

  The first thing to try would be to re-download the 'AppCloudServices' module from the App Store.  Sometimes that can be overwritten when adding other modules or upgrading the project.  Try re-downloading it here:

And see if that fixes things for you.