500/NPE response while PUTting entity link

696 > PUT https://test-ma0rr03-atslats-batch-1kwen.jira-dev.com:443/builds/rest/applinks/1.0/entitylink/com.atlassian.applinks.api.application.bamboo.BambooProjectEntityType/ELP?os_authType=basic&os_username=admin&os_password=admin&reciprocate=false
696 > Content-Type: application/json
{"applicationId":"98677f4d-9c3b-30d2-8159-ddea6b29d08b","key":"ELP","name":"Entity Linked Project","typeId":"confluence.space"}

.	 Backdoor PUT    in   334ms  /builds/rest/applinks/1.0/entitylink/com.atlassian.applinks.api.application.bamboo.BambooProjectEntityType/ELP
May 24, 2016 2:11:20 PM com.sun.jersey.api.client.filter.LoggingFilter log
INFO: 696 * Client in-bound response
696 < 500
696 < Server: nginx
696 < Date: Tue, 24 May 2016 14:11:20 GMT
696 < Content-Type: application/xml
696 < Transfer-Encoding: chunked
696 < Connection: keep-alive
696 < X-ASEN: SEN-2864386
696 < Set-Cookie: JSESSIONID=08C1B9DFFD60DC6F7413F346DF37932B; Path=/builds/; Secure; HttpOnly
696 < Set-Cookie: studio.crowd.tokenkey=""; Domain=.test-ma0rr03-atslats-batch-1kwen.jira-dev.com; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/; Secure; HttpOnly
696 < Set-Cookie: studio.crowd.tokenkey=0Vgk7w89YRHdGOW5kXOiAg00; Domain=.test-ma0rr03-atslats-batch-1kwen.jira-dev.com; Path=/; Secure; HttpOnly
696 < X-Seraph-LoginReason: OUT
696 < X-Seraph-LoginReason: OK
696 < X-Content-Type-Options: nosniff
696 < Vary: Accept
696 <
<?xml version="1.0" encoding="UTF-8" standalone="yes"?><status><status-code>500</status-code><stack-trace>java.lang.NullPointerException
at com.atlassian.bamboo.security.applinks.BambooHostApplication.toEntityReference(BambooHostApplication.java:126)
at com.atlassian.bamboo.security.applinks.BambooHostApplication.toEntityReference(BambooHostApplication.java:136)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.atlassian.plugin.util.ContextClassLoaderSettingInvocationHandler.invoke(ContextClassLoaderSettingInvocationHandler.java:26)
at com.sun.proxy.$Proxy231.toEntityReference(Unknown Source)