Error getting response javax.net.ssl.SSLException: Unsupported or unrecognized SSL message

Hello Community,
I have followed this tutorial Securing MockServices with SSL, to configure https call in SoapUI, my mock service is running on http://WL-748TFB3:8180/mockOsg, it returns reponse, then I tried to generate keystore to put in SSL preferences (screenshot_1)

so that i can establish https connection, but when I hit  https://WL-748TFB3:8180/mockOsg, i get the following error (screenshot_2) :

Thu Jan 16 16:42:42 CET 2025:INFO:Error getting response for [Osg.ProcessText:Request 1]; javax.net.ssl.SSLException: Unsupported or unrecognized SSL message

Do I have something wrong in my ssl configuration ? in request ? do i need to add/change my configuration that's not mentionned in soapUI ?

Thanks in advance :)