IIS Error 405 when opening a Sharepoint provider-hosted App

I created a test application for Sharepoint 2013. Basically I just added a Button to the Default.aspx, to see if the whole deploying works.

It is a provider-hosted Application, deployed to a IIS 8. I followed the MSDN article for the deployment: How to: Package and publish high-trust apps for SharePoint 2013 (https://msdn.microsoft.com/EN-US/library/jj860570.aspx)

Now when I want to add the App in SharePoint to a site collection I get the following error:

URL: https://'development-server':4444/Pages/Default.aspx?SPHostUrl=https%3A%2F%2Fportal-t%2E'DOMAIN'%2E'DOMAIN-TLD'%2Fsites%2Ftest%2Fhome%2Fit&SPLanguage=en-US&SPClientTag=0&SPProductNumber=15%2E0%2E4569%2E1000

"405 - HTTP verb used to access this page is not allowed. The page you are looking for cannot be displayed because an invalid method (HTTP verb) was used to attempt access."

I searched a lot on this error but found no solution.

Regards