TypeError: Cannot read properties of undefined (reading 'author')
   at /home/virtwww/w_krigaspb_d500f901/myapp/site.js:51:22
   at Layer.handle [as handle_request] (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/layer.js:95:5)
   at next (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/route.js:144:13)
   at Route.dispatch (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/route.js:114:3)
   at Layer.handle [as handle_request] (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/layer.js:95:5)
   at /home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/index.js:284:15
   at Function.process_params (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/index.js:346:12)
   at next (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/express/lib/router/index.js:280:10)
   at SendStream.error (/home/virtwww/w_krigaspb_d500f901/myapp/node_modules/serve-static/index.js:121:7)
   at SendStream.emit (node:events:513:28)