ssrs error Maximum request length exceeded
<p>I open a report file (created in SSRS 2014) in report builder of SSRS 2016 in order to save it into report manager site OR preview it, I get this error:</p>

<pre><code>System.Web.Services.Protocols.SoapException: There was an exception running
the extensions specified in the config file. ---&gt; System.Web.HttpException: 
  Maximum request length exceeded.
at System.Web.HttpRequest.GetEntireRawContent()
at System.Web.HttpRequest.get_InputStream()
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
   --- End of inner exception stack trace ---
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type, 
 HttpContext context, HttpRequest request, HttpResponse response, Boolean&amp; 
   abortProcessing)
</code></pre>

<p>Upload option on report manager site doesn't work either.</p>