Can't add Confluence as fileserver

Hello! I've tried to add our Confluence server as fileserver, but I can't

 We are using JIRA 7.3.5

Test was ok, but adding was freezing.

Here is the log fro JIRA

20-Apr-2017 15:48:27.349 WARNING [http-nio-8080-exec-18] com.sun.jersey.spi.container.servlet.WebComponent.filterFormParameters A servlet request, to the URI http://amo06/rest/issueNav/latest/preferredSearchLayout, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
H0Nd@5DD20-Apr-2017 15:49:23.291 WARNING [http-nio-8080-exec-1] com.sun.jersey.spi.container.servlet.WebComponent.filterFormParameters A servlet request, to the URI http://amo06.rsint.net/rest/issueNav/1/issueTable/stable, contains form parameters in the request body but the request body has been consumed by the servlet or a servlet filter accessing the request parameters. Only resource methods using @FormParam will work as expected. Resource methods consuming the request body by other means will not work as expected.
2017-04-20 15:49:35,121 http-nio-8080-exec-21 ERROR PARSHUKO 949x28443x1 1lapmmz 172.23.112.131 /rest/jiraxporter/1.0/servers [c.a.p.r.c.error.jersey.ThrowableExceptionMapper] Uncaught exception thrown by REST service: No installed provider supports this key: (null)
java.security.InvalidKeyException: No installed provider supports this key: (null)
at javax.crypto.Cipher.chooseProvider(Cipher.java:893)
at javax.crypto.Cipher.init(Cipher.java:1249)
at javax.crypto.Cipher.init(Cipher.java:1186)
at com.xpandit.jiraxporter.security.AsymmetricCipherImpl.encrypt(AsymmetricCipherImpl.java:184)
at com.xpandit.jiraxporter.rest.services.XporterServersService.setServerConnInfo(XporterServersService.java:355)
at com.xpandit.jiraxporter.rest.services.XporterServersService.create(XporterServersService.java:143)
... 3 filtered
at java.lang.reflect.Method.invoke(Method.java:498)
... 18 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter$JerseyOsgiServletContainer.doFilter(RestDelegatingServletFilter.java:154)
... 1 filtered
at com.atlassian.plugins.rest.module.RestDelegatingServletFilter.doFilter(RestDelegatingServletFilter.java:68)
... 36 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 53 filtered
at com.atlassian.jira.security.JiraSecurityFilter.lambda$doFilter$0(JiraSecurityFilter.java:80)
... 1 filtered
at com.atlassian.jira.security.JiraSecurityFilter.doFilter(JiraSecurityFilter.java:78)
... 16 filtered
at com.atlassian.plugins.rest.module.servlet.RestSeraphFilter.doFilter(RestSeraphFilter.java:37)
... 20 filtered
at com.atlassian.jira.servermetrics.CorrelationIdPopulatorFilter.doFilter(CorrelationIdPopulatorFilter.java:30)
... 10 filtered
at com.atlassian.web.servlet.plugin.request.RedirectInterceptingFilter.doFilter(RedirectInterceptingFilter.java:21)
... 4 filtered
at com.atlassian.web.servlet.plugin.LocationCleanerFilter.doFilter(LocationCleanerFilter.java:36)
... 29 filtered
at com.atlassian.jira.servermetrics.MetricsCollectorFilter.doFilter(MetricsCollectorFilter.java:25)
... 28 filtered
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)