143139 Troubleshooting Word Press

I have two WordPress websites that need help with adjustments. 1) One site needs help with proper configuartion for the Google (XML) Sitemap plugin. Already installed but files and settings need to be adjusted. I also need some clarification about how to configure this set up so that I can apply it to my other sites in the future. 2) Another site is using the latest version of WordPress and the Rich Text Editor is not allowing me to insert text into the post. I need help to resolve this issue. Only programmers who truly understand WordPress should respond.