Cannot load Azure Tools Package

Hi I have issues when trinh to publish my webApi to Azure. It crashes de Visual Studio. Here are de logs:

<entry><record>745</record>

    <time>2016/04/05 12:27:47.430</time>
    <type>Information</type>
    <source>VisualStudio</source>
    <description>Begin package load [CommonAzureToolsPackage]</description>
    <guid>{1E863AE9-93F6-42FD-A301-D3391F876208}</guid>
  </entry>
  <entry>
    <record>746</record>
    <time>2016/04/05 12:27:47.529</time>
    <type>Information</type>
    <source>VisualStudio</source>
    <description>Entering function CVsPackageInfo::HrInstantiatePackage</description>
    <guid>{9C987E78-F0BF-45CA-9BA5-96D3E4B2BAC6}</guid>
  </entry>
  <entry>
    <record>747</record>
    <time>2016/04/05 12:27:47.529</time>
    <type>Warning</type>
    <source>VisualStudio</source>
    <description>Appid denied the loading of package</description>
    <guid>{9C987E78-F0BF-45CA-9BA5-96D3E4B2BAC6}</guid>
  </entry>
  <entry>
    <record>748</record>
    <time>2016/04/05 12:27:47.529</time>
    <type>Warning</type>
    <source>VisualStudio</source>
    <description>Package failed to load; error message suppressed by skip flag</description>
    <guid>{9C987E78-F0BF-45CA-9BA5-96D3E4B2BAC6}</guid>
  </entry>
  <entry>
    <record>749</record>
    <time>2016/04/05 12:27:48.125</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>SetSite failed for package [CommonAzureToolsPackage][Object reference not set to an instance of an object.]:{   at Microsoft.VisualStudio.WindowsAzure.CommonAzureTools.Authentication.KeychainUtil.&lt;&lt;SetAccountManager&gt;b__0&gt;d__1.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;  

</description>
    <guid>{1E863AE9-93F6-42FD-A301-D3391F876208}</guid>
    <hr>80004003 - E_POINTER</hr>
    <errorinfo>Object reference not set to an instance of an object.</errorinfo>
  </entry>
  <entry>
    <record>750</record>
    <time>2016/04/05 12:27:50.737</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>End package load [CommonAzureToolsPackage]</description>
    <guid>{1E863AE9-93F6-42FD-A301-D3391F876208}</guid>
    <hr>80004003 - E_POINTER</hr>
    <errorinfo>Object reference not set to an instance of an object.</errorinfo>
  </entry>