Intouch http and https connection attempt fails with code SSL_ERROR_NO_CYPHER_OVERLAP

Hello,

having a setup where i need to make intouch connections available for users of incontrol2.

There is a webserver in the networkable to do both http and https.

Trying with https im getting SSL_ERROR_NO_CYPHER_OVERLAP error - would this be the server not having any cipher algorithms available?
Trying with http im getting the same error!! Which i guess should not happen, bcs http is not TLS’ed i.e. not using any ciphers. Where in Incontrol/Balance router does this translation happen?
Trying the “oldfashioned way” with portforwarding - i can get through to the server instantly - so server is working.

I have tryíed copying the setup with a BR1 and a small webserver in my office. Here everything works smoothly.

So where is my problem lying? Anywhere in Incontrol its possible to steer http into https which i should need to disable?