Unusable Web interface after memory increase

Hello everbody !

I have a new problem with my Yùn : after having increase the memory storage (by following this topic) and upgrading the various items that needed to, I can't access the Web Interface. In fact I get the sceen in attachement.

When I try to use the linux distribution via YunSerialTerminal, it does work, as in the following example :

Please press Enter to activate this console. 


BusyBox v1.19.4 (2016-04-08 02:46:32 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

      ___                   ___                       ___           ___     
     /\__\      ___        /\__\          ___        /\__\         /\  \    
    /:/  /     /\  \      /::|  |        /\  \      /::|  |       /::\  \   
   /:/  /      \:\  \    /:|:|  |        \:\  \    /:|:|  |      /:/\:\  \  
  /:/  /       /::\__\  /:/|:|  |__      /::\__\  /:/|:|  |__   /:/  \:\  \ 
 /:/__/     __/:/\/__/ /:/ |:| /\__\  __/:/\/__/ /:/ |:| /\__\ /:/__/ \:\__\
 \:\  \    /\/:/  /    \/__|:|/:/  / /\/:/  /    \/__|:|/:/  / \:\  \ /:/  /
  \:\  \   \::/__/         |:/:/  /  \::/__/         |:/:/  /   \:\  /:/  / 
   \:\  \   \:\__\         |::/  /    \:\__\         |::/  /     \:\/:/  /  
    \:\__\   \/__/         /:/  /      \/__/         /:/  /       \::/  /   
     \/__/                 \/__/                     \/__/         \/__/   
                                                                                       
            _______                     ________        __
           |       |.-----.-----.-----.|  |  |  |.----.|  |_
           |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
           |_______||   __|_____|__|__||________||__|  |____|
                    |__| W I R E L E S S   F R E E D O M

root@(none):/# [   41.390000] Loading modules backported from Linux version master-2014-05-22-0-gf2032ea
[   41.390000] Backport generated by backports.git backports-20140320-37-g5c33da0
[   41.570000] cfg80211: Calling CRDA to update world regulatory domain
[   41.570000] cfg80211: World regulatory domain updated:
[   41.570000] cfg80211:  DFS Master region: unset
[   41.570000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[   41.580000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   41.580000] cfg80211:   (2457000 KHz - 2482000 KHz @ 40000 KHz), (N/A, 2000 mBm), (N/A)
[   41.580000] cfg80211:   (2474000 KHz - 2494000 KHz @ 20000 KHz), (N/A, 2000 mBm), (N/A)
[   41.590000] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[   41.590000] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 2000 mBm), (N/A)
[   41.590000] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 0 mBm), (N/A)
[   42.540000] ieee80211 phy0: Atheros AR9330 Rev:1 mem=0xb8100000, irq=2
[   42.540000] cfg80211: Calling CRDA for country: US
[   42.540000] cfg80211: Regulatory domain changed to country: US
[   42.550000] cfg80211:  DFS Master region: FCC
[   42.550000] cfg80211:   (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp), (dfs_cac_time)
[   42.550000] cfg80211:   (2402000 KHz - 2472000 KHz @ 40000 KHz), (N/A, 3000 mBm), (N/A)
[   42.560000] cfg80211:   (5170000 KHz - 5250000 KHz @ 80000 KHz), (N/A, 1700 mBm), (N/A)
[   42.560000] cfg80211:   (5250000 KHz - 5330000 KHz @ 80000 KHz), (N/A, 2300 mBm), (0 s)
[   42.560000] cfg80211:   (5735000 KHz - 5835000 KHz @ 80000 KHz), (N/A, 3000 mBm), (N/A)
[   42.570000] cfg80211:   (57240000 KHz - 63720000 KHz @ 2160000 KHz), (N/A, 4000 mBm), (N/A)
[   42.920000] NTFS driver 2.1.30 [Flags: R/O MODULE].
[   43.200000] Error: Driver 'gpio-keys-polled' is already registered, aborting...
[   43.280000] loop: module loaded
[   43.490000] PPP generic driver version 2.4.2
[   43.750000] ip_tables: (C) 2000-2006 Netfilter Core Team
[   43.880000] NET: Registered protocol family 24
[   43.990000] nf_conntrack version 0.5.0 (955 buckets, 3820 max)
[   44.530000] i2c /dev entries driver
[   44.670000] Linux video capture interface: v2.00
[   44.910000] fuse init (API version 7.18)
[   47.370000] No need to change console settings
[   57.470000] busybox: sending ioctl 5310 to a partition!
[   57.470000] busybox: sending ioctl 5310 to a partition!
[   57.490000] busybox: sending ioctl 5310 to a partition!
[   57.490000] busybox: sending ioctl 5310 to a partition!
[   58.180000] wlan0: authenticate with e4:5d:51:18:7b:5e
[   58.190000] wlan0: send auth to e4:5d:51:18:7b:5e (try 1/3)
[   58.190000] wlan0: authenticated
[   58.230000] wlan0: associate with e4:5d:51:18:7b:5e (try 1/3)
[   58.240000] wlan0: RX AssocResp from e4:5d:51:18:7b:5e (capab=0x1411 status=0 aid=2)
[   58.240000] wlan0: associated
[   58.410000] Start uSDaemon
[   62.700000] uSDaemon ... UP
[   73.200000] warning: `alljoyn-daemon' uses 32-bit capabilities (legacy support in use)
[   74.160000] not exporting...
[   74.220000] not exporting...

root@arduino:/# help
Built-in commands:
------------------
	. : [ [[ alias bg break cd chdir command continue echo eval exec
	exit export false fg getopts hash help jobs kill let local printf
	pwd read readonly return set shift source test times trap true
	type ulimit umask unalias unset wait

root@arduino:/# df -h
Filesystem                Size      Used Available Use% Mounted on
rootfs                    1.7G     76.6M      1.6G   5% /
/dev/root                 9.8M      9.8M         0 100% /rom
tmpfs                    29.9M    108.0K     29.8M   0% /tmp
tmpfs                   512.0K         0    512.0K   0% /dev
/dev/sda2                 1.7G     76.6M      1.6G   5% /overlay
overlayfs:/overlay        1.7G     76.6M      1.6G   5% /
/dev/sda1                 1.9G     12.0K      1.9G   0% /mnt/sda1
root@arduino:/# -okg
/bin/ash: -okg: not found
root@arduino:/# test
root@arduino:/# exit

Please press Enter to activate this console. 


BusyBox v1.19.4 (2016-04-08 02:46:32 CEST) built-in shell (ash)
Enter 'help' for a list of built-in commands.

      ___                   ___                       ___           ___     
     /\__\      ___        /\__\          ___        /\__\         /\  \    
    /:/  /     /\  \      /::|  |        /\  \      /::|  |       /::\  \   
   /:/  /      \:\  \    /:|:|  |        \:\  \    /:|:|  |      /:/\:\  \  
  /:/  /       /::\__\  /:/|:|  |__      /::\__\  /:/|:|  |__   /:/  \:\  \ 
 /:/__/     __/:/\/__/ /:/ |:| /\__\  __/:/\/__/ /:/ |:| /\__\ /:/__/ \:\__\
 \:\  \    /\/:/  /    \/__|:|/:/  / /\/:/  /    \/__|:|/:/  / \:\  \ /:/  /
  \:\  \   \::/__/         |:/:/  /  \::/__/         |:/:/  /   \:\  /:/  / 
   \:\  \   \:\__\         |::/  /    \:\__\         |::/  /     \:\/:/  /  
    \:\__\   \/__/         /:/  /      \/__/         /:/  /       \::/  /   
     \/__/                 \/__/                     \/__/         \/__/   
                                                                                       
            _______                     ________        __
           |       |.-----.-----.-----.|  |  |  |.----.|  |_
           |   -   ||  _  |  -__|     ||  |  |  ||   _||   _|
           |_______||   __|_____|__|__||________||__|  |____|
                    |__| W I R E L E S S   F R E E D O M

root@arduino:/# cd
root@arduino:~# stop
/bin/ash: stop: not found
root@arduino:~# help
Built-in commands:
------------------
	. : [ [[ alias bg break cd chdir command continue echo eval exec
	exit export false fg getopts hash help jobs kill let local printf
	pwd read readonly return set shift source test times trap true
	type ulimit umask unalias unset wait

What can I do to get it back ?

Thanks a lot !