just remove session cookie, if its set

mod.ts

@@ -308,10 +308,12 @@ export class HTTPServer {
           maxAge: this.settings.sessionExpire ?? undefined,
         });
       } else {
+        if (routeRequest.cookie("session")) {
           routeReply.cookie("session", undefined);
         }
       }
     }
+  }
 
   close() {
     if (this.server) {
@@ -468,6 +470,7 @@ export class RouteRequest {
       try {
         this.session = JSON.parse(decodedSessionCookie);
       } catch (_err) {
+        console.log(_err);
         // Ignore if sessionCookie is not in JSON format
       }
     }