Problem setting up myopenhab service on openhab2 installed on windows 10

I don’t know if this is related to your problem, but there are problems with my.openhab if you aren’t using the latest Oracle Java version. See this thread:

https://community.openhab.org/t/my-openhab-org-is-online-ios-app-doesnt-show-sitemap-solution-java-upgrade/12858

Maybe you check this first?