Can’t approve or delete comments and Pages have disappeared in admin

I am not a programmer and the one who installed me w.p. is no longer available to me.
I received a comment and can’t approve or delete and when I tried to approve received the following message: “You are not allowed to edit comments on this post, so you cannot approve this comment”. There have been 7 other comments I have not been able to delete that were obviously spam but they don’t appear at my site. This most recent was not spam and I cant approve. The post that all these comments are related to appears in my admin with no checkbox next to it and only allows me to view unlike all my other posts where I can do the usual edit, view, etc.

Also, my pages have disappeared in my Admin. I can’t edit, view, add new… I can only do so with my posts (excep for the one previously mentioned). The pages do appear at my blog however but I have no access to them? https://www.12Steps4Romance.com/blog

Please help!
Robin