We are sorry we were not able to help you in time. In fact our entire support service has been missing for the last 30 days due to company issues. For a very short period we’ve left without any staff to handle requests and it took us some time to resolve this problem. We’ve now managed to restore our service and support will be provided with the normal rate.
About your problem: blog categories are called tags and are available as a block (widget) in Page Builder: