Failed to execute API call

An API call could not be processed due to an internal exception.

Icinga for Windows exception report:

Exception Message:
Exception calling "Read" with "3" argument(s): "Unable to read data from the transport connection: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond."

Command Origin:
Internal

Script Line Number:
32551

Exact Position:
At C:\Program Files\WindowsPowerShell\Modules\icinga-powershell-framework\cache\framework_cache.psm1:32551 char:9
+         $ReadBytes      = $Stream.Read($buffer, 0, $ReadLength);
+         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

StackTrace:
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at New-IcingaForWindowsRESTThread(Closure , FunctionContext )

Call Stack:

Command                        Arguments                                                                               
-------                        ---------                                                                               
Get-IcingaExceptionString      {ExceptionObject=Exception calling "Read" with "3" argument(s): "Unable to read data ...
Write-IcingaEventMessage       {Namespace=RESTApi, EventId=2051, ExceptionObject=Exception calling "Read" with "3" a...
New-IcingaForWindowsRESTThread {RequireAuth=, ThreadId=3}                                                              

Object details:

No additional object details provided.