Switching to development mode and getting this error v12

below is the error i am getting… after running bench start.
/usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
RequestsDependencyWarning)
10:12:24 system | redis_socketio.1 started (pid=4243)
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.914 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.914 # Server can’t set maximum open files to 10032 because of OS error: Operation not permitted.
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.914 # Current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase ‘ulimit -n’.
10:12:24 redis_socketio.1 | .
10:12:24 redis_socketio.1 | .-__ ''-._ 10:12:24 redis_socketio.1 | _.- . . ‘’-._ Redis 3.2.12 (00000000/0) 64 bit
10:12:24 redis_socketio.1 | .- .-```. ```\/ _.,_ ''-._ 10:12:24 redis_socketio.1 | ( ' , .-` | `, ) Running in standalone mode 10:12:24 redis_socketio.1 | |`-._`-...-` __...-.-.|'_.-'| Port: 12000 10:12:24 redis_socketio.1 | | -. ._ / _.-' | PID: 4243 10:12:24 redis_socketio.1 | -._ -._ -./ .-’ .-’
10:12:24 redis_socketio.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:24 redis_socketio.1 | | -.
-._ _.-'_.-' | http://redis.io 10:12:24 redis_socketio.1 | -._ -._-..-'.-’ .-’
10:12:24 redis_socketio.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:24 redis_socketio.1 | | -.
-._ _.-'_.-' | 10:12:24 redis_socketio.1 | -._ -._-.
.-‘.-’ .-’
10:12:24 redis_socketio.1 | -._ -..-’ _.-’
10:12:24 redis_socketio.1 | -._ _.-' 10:12:24 redis_socketio.1 | -.
.-’
10:12:24 redis_socketio.1 |
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.916 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.916 # Server started, Redis version 3.2.12
10:12:24 redis_socketio.1 | 4243:M 24 Jun 10:12:24.916 * The server is now ready to accept connections on port 12000
10:12:24 system | schedule.1 started (pid=4255)
10:12:24 system | worker_long.1 started (pid=4253)
10:12:24 system | redis_queue.1 started (pid=4254)
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.958 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.958 # Server can’t set maximum open files to 10032 because of OS error: Operation not permitted.
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.958 # Current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase ‘ulimit -n’.
10:12:24 redis_queue.1 | .
10:12:24 redis_queue.1 | .-__ ''-._ 10:12:24 redis_queue.1 | _.- . . ‘’-.
Redis 3.2.12 (00000000/0) 64 bit
10:12:24 redis_queue.1 | .- .-```. ```\/ _.,_ ''-._ 10:12:24 redis_queue.1 | ( ' , .-` | `, ) Running in standalone mode 10:12:24 redis_queue.1 | |`-._`-...-` __...-.-.
|’_.-'| Port: 11000 10:12:24 redis_queue.1 | | -._ ._ / _.-' | PID: 4254 10:12:24 redis_queue.1 | -._ -._ -./ .-’ .-’
10:12:24 redis_queue.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:24 redis_queue.1 | | -.
-._ _.-'_.-' | http://redis.io 10:12:24 redis_queue.1 | -._ -._-..-'.-’ .-’
10:12:24 redis_queue.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:24 redis_queue.1 | | -.
-._ _.-'_.-' | 10:12:24 redis_queue.1 | -._ -._-.
.-‘.-’ .-’
10:12:24 redis_queue.1 | -._ -..-’ _.-’
10:12:24 redis_queue.1 | -._ _.-' 10:12:24 redis_queue.1 | -.
.-’
10:12:24 redis_queue.1 |
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.959 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.959 # Server started, Redis version 3.2.12
10:12:24 redis_queue.1 | 4254:M 24 Jun 10:12:24.959 * The server is now ready to accept connections on port 11000
10:12:24 system | worker_default.1 started (pid=4261)
10:12:24 system | watch.1 started (pid=4247)
10:12:25 system | socketio.1 started (pid=4260)
10:12:25 system | web.1 started (pid=4258)
10:12:25 system | worker_short.1 started (pid=4262)
10:12:25 system | redis_cache.1 started (pid=4263)
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.005 # You requested maxclients of 10000 requiring at least 10032 max file descriptors.
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.005 # Server can’t set maximum open files to 10032 because of OS error: Operation not permitted.
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.005 # Current maximum open files is 4096. maxclients has been reduced to 4064 to compensate for low ulimit. If you need higher maxclients increase ‘ulimit -n’.
10:12:25 redis_cache.1 | .
10:12:25 redis_cache.1 | .-__ ''-._ 10:12:25 redis_cache.1 | _.- . . ‘’-.
Redis 3.2.12 (00000000/0) 64 bit
10:12:25 redis_cache.1 | .- .-```. ```\/ _.,_ ''-._ 10:12:25 redis_cache.1 | ( ' , .-` | `, ) Running in standalone mode 10:12:25 redis_cache.1 | |`-._`-...-` __...-.-.
|’_.-'| Port: 13000 10:12:25 redis_cache.1 | | -._ ._ / _.-' | PID: 4263 10:12:25 redis_cache.1 | -._ -._ -./ .-’ .-’
10:12:25 redis_cache.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:25 redis_cache.1 | | -.
-._ _.-'_.-' | http://redis.io 10:12:25 redis_cache.1 | -._ -._-..-'.-’ .-’
10:12:25 redis_cache.1 | |-._-.
-.__.-' _.-'_.-'| 10:12:25 redis_cache.1 | | -.
-._ _.-'_.-' | 10:12:25 redis_cache.1 | -._ -._-.
.-‘_.-’ _.-’
10:12:25 redis_cache.1 | -._ -..-’ _.-’
10:12:25 redis_cache.1 | -._ _.-' 10:12:25 redis_cache.1 | -.
.-’
10:12:25 redis_cache.1 |
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.006 # WARNING: The TCP backlog setting of 511 cannot be enforced because /proc/sys/net/core/somaxconn is set to the lower value of 128.
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.006 # Server started, Redis version 3.2.12
10:12:25 redis_cache.1 | 4263:M 24 Jun 10:12:25.006 * The server is now ready to accept connections on port 13000
10:12:26 socketio.1 | listening on *: 9000
10:12:26 worker_default.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 worker_default.1 | RequestsDependencyWarning)
10:12:26 schedule.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 schedule.1 | RequestsDependencyWarning)
10:12:26 web.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 web.1 | RequestsDependencyWarning)
10:12:26 worker_long.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 worker_long.1 | RequestsDependencyWarning)
10:12:26 worker_short.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 worker_short.1 | RequestsDependencyWarning)
10:12:26 watch.1 | /usr/lib/python2.7/site-packages/requests/init.py:91: RequestsDependencyWarning: urllib3 (1.25.3) or chardet (2.2.1) doesn’t match a supported version!
10:12:26 watch.1 | RequestsDependencyWarning)
10:12:33 web.1 | * Running on http://0.0.0.0:8000/ (Press CTRL+C to quit)
10:12:33 web.1 | * Restarting with inotify reloader
10:12:33 watch.1 | yarn run v1.16.0
10:12:33 watch.1 | $ node rollup/watch.js
10:12:34 web.1 | * Debugger is active!
10:12:34 web.1 | * Debugger PIN: 179-031-899
10:12:34 watch.1 |
10:12:34 watch.1 | Rollup Watcher Started
10:12:34 watch.1 |
10:12:34 watch.1 | Watching…
10:12:35 watch.1 | Error in: undefined
10:12:35 watch.1 | Error: watch /home/frappe/frappe-bench/apps/frappe/frappe/public/less/variables.less ENOSPC