Bench start not working "redis_cache.1 stopped (rc=-15)"

| Error: Cannot find module ‘express’
11:21:12 socketio.1 | at Function.Module._resolveFilename (module.js:469:15)
11:21:12 socketio.1 | at Function.Module._load (module.js:417:25)
11:21:12 socketio.1 | at Module.require (module.js:497:17)
11:21:12 socketio.1 | at require (internal/module.js:20:19)
11:21:12 socketio.1 | at Object. (/home/omar/dev/frappe-bench/apps/frappe/socketio.js:1:91)
11:21:12 socketio.1 | at Module._compile (module.js:570:32)
11:21:12 socketio.1 | at Object.Module._extensions…js (module.js:579:10)
11:21:12 socketio.1 | at Module.load (module.js:487:32)
11:21:12 socketio.1 | at tryModuleLoad (module.js:446:12)
11:21:12 socketio.1 | at Function.Module._load (module.js:438:3)
11:21:12 system | socketio.1 stopped (rc=1)

Hi All:
When I’m trying to start the bench i got previous error, can you help me please?
I think this problem because of Redis,
I tried all solutions on discussion

npm install express

thanks @saurabh6790
The Error become: Error: Cannot find module ‘redis’

another question plz:
“npm install express” inside frappe environment “source ./env/bin/activate”

Do npm install redis

after install all missing modules.
localhost:8000 ->

Thanks a lot @saurabh6790.
Now it’s work good
best regards