not able to update icon to Advance services resource action

Hello,

while i am trying to update the icon to the resource action, i an getting error in Catalina.out logs as below

2015-09-23 22:24:04,224 vcac: [component="cafe:shell" priority="ERROR" thread="tomcat-http--293" tenant=""] com.vmware.vcac.shell.ErrorManagerImpl.logToApacheCommons:59 - <b64643ab> Unexpected exception was caught

com.google.gwt.event.shared.UmbrellaException: Exception caught: (TypeError)

description: Unable to get value of the property 'n': object is null or undefined

number: -2146823281

__gwt$exception: <skipped>: Unable to get value of the property 'n': object is null or undefined

        at Unknown.Xj(Unknown Source)

        at Unknown.ek(Unknown Source)

        at Unknown.nD(Unknown Source)

        at Unknown.qD(Unknown Source)

        at Unknown.uC(Unknown Source)

        at Unknown.Mfc(Unknown Source)

        at Unknown.$fc(Unknown Source)

        at Unknown.Xy(Unknown Source)

        at Unknown.Pfc(Unknown Source)

        at Unknown.bgc(Unknown Source)

        at Unknown.znc(Unknown Source)

        at Unknown.mpc(Unknown Source)

        at Unknown.Kl(Unknown Source)

        at Unknown.Pl(Unknown Source)

        at Unknown.anonymous(Unknown Source)

Caused by: com.google.gwt.core.client.JavaScriptException: (TypeError)

description: Unable to get value of the property 'n': object is null or undefined

number: -2146823281

__gwt$exception: <skipped>: Unable to get value of the property 'n': object is null or undefined

this is the default image 100x100 in png format.

Please help!!

thanks

MG