Turn off Deprecated messages. They are warnings that it might not work in php8 but won't cause an issue in the current version. Those messages can be turned off and ignored for now.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.