Magento 1.9 SOAP and VB.NET (Login-Error)

[Baecker]

Hi there,

have had a working login with VB.NET and SOAP (Magento 1.9.2.3) for some time.

After updating to Magento 1.9.4.4 and PHP 7.2, the login unfortunately no longer works.
Also Cannot access the interface using https.

Is being used
https: // [domain] /index.php/api/v2_soap?wsdl=1

or
http: // [domain] /index.php/api/v2_soap?wsdl=1

Here is the code:

         Dim mf As New MagentoSOAP1.filters

         Try
             Mage_SessionId = Mage.login ("[user]", "[pw]")
             Msgbox ("Connection established ...")
             Return True
         Catch ex as exception
             MsgBox (ex.Message)
             Return false
         End try

Is this behavior known?
Maybe there is already a solution?