The error message present in the snapshot means that you have defined your slave site based on a "website template" and in this website template, you use a "from" site id that does not any configuration defined.
This explain why you have the error when you save the slave site and why JMS does not update it index with all the domain.
You should first fix the problem in the slave site used by the website template defined in your renewableshub slave site.
A work arround to force JMS rebuild its index is to create another slave site (event a fake one) that you will save. When JMS save any slave site, it rebuilt all its index and the
renewableshub.com will be saved into JMS index.