As per your earlier reply, you have shared the webdispatcher parameter details in which we can see the parameter icm/server_port* and icm/HTTP_redirect* is mentioned mutiple times.
1. Please remove the parameter which are defined multiple times
2. Add below parameters
wdisp/ssl_encrypt = 0
wdisp/add_client_protocol_header = true
icm/HTTPS/verify_client = 0
Once above 3 activities are performed, restart the instance.
If issue still exists, please share the screenshot of HTTP trace of browser and webdispatcher logs.
Regards,
Anil