“This site can’t be reached” after change domain GCP + openLiteSpeed

First of all I’m using Google cloud platform VM instance, openLiteSpeed + wordpress site. I’m on fly more than a year with some domain and everything works well. Today I bought a new domain and set it to my website and from this moment I can’t enter to my site even if I’m using the External IP of my instance. For now I deleted all my records in DNS section to try to handle this problem and still it does not work. I also changed the virtual mapping on Listener section in openLiteSpeed dashboard. I don’t have idea what todo next, I try to solve this more than 5 hours. Any suggestions how can I solve it ?

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