Update server/src/user_interface/web_server/http_server.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: AntoineBuirey

server/src/user_interface/web_server/http_server.py

@@ -304,7 +304,7 @@ def create_new_server() -> FlaskReturnData:
                     Logger.debug("Invalid server name")
                     return {"message": "Invalid parameters"}, HTTP.BAD_REQUEST
                 server_name = html.escape(server_name.strip())
-                if not server_type or not isinstance(server_type, str) and server_type not in McServersModules:
+                if not server_type or not isinstance(server_type, str) or server_type not in McServersModules:
                     Logger.debug("Invalid server type")
                     return {"message": "Invalid parameters"}, HTTP.BAD_REQUEST