I am also having a similar problem and do not have premium XOA
my install works and shows in cloud dashboard, but it is not loading in the xcp-ng plugin
as per Xen XCP-ng | Learn Netdata
I have installed xen-dom0-libs-devel and yajl-devel before running --reinstall
@ilyam8 xcp-ng provides their own netdata package - but they do not keep it updated (netdata-ui)
ref: Netdata package is now available in XCP-ng | XCP-ng and XO forum