Guice provision errors

Guice provision errors

I am using Admin SDK 1.8.2. I am getting below exception. Can anyone tell
me, what i need to do for it.?
Problem accessing /openid. Reason:
Guice provision errors:
1) Error injecting constructor, java.lang.NullPointerException at
com.cloudcodes.samples.apps.marketplace.openid.appengine.AppEngineTrustsRootProvider.(AppEngineTrustsRootProvider.java:33)
while locating
com.cloudcodes.samples.apps.marketplace.openid.appengine.AppEngineTrustsRootProvider
while locating com.google.step2.xmlsimplesign.TrustRootsProvider for
parameter 0 at
com.google.step2.xmlsimplesign.CachedCertPathValidator.(CachedCertPathValidator.java:61)
while locating com.google.step2.xmlsimplesign.CachedCertPathValidator for
parameter 0 at com.google.step2.xmlsimplesign.Verifier.(Verifier.java:51)
while locating com.google.step2.xmlsimplesign.Verifier for parameter 1 at
com.google.step2.discovery.LegacyXrdsResolver.(LegacyXrdsResolver.java:91)
while locating com.google.step2.discovery.LegacyXrdsResolver while
locating com.google.step2.discovery.XrdDiscoveryResolver for parameter 1
at com.google.step2.discovery.Discovery2.(Discovery2.java:167) while
locating com.google.step2.discovery.Discovery2 for parameter 1 at
com.google.step2.ConsumerHelper.(ConsumerHelper.java:60) while locating
com.google.step2.ConsumerHelper