Error in cannot read /lib/apps/web-index.lua at line I/O error

[Thomas]

OK, the device has been reset and now it looks OK.
What SD card do I need? Do you have a suggestion?

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I see this in my system log:
Nov 20 13:22:33 UHR-VISU kern.notice kernel: [ 9.854655] random: nonblocking pool is initialized
Nov 20 13:22:28 UHR-VISU kern.info kernel: [ 5.667099] fec 2188000.ethernet eth0: Link is Up - 100Mbps/Full - flow control off
Nov 20 13:22:28 UHR-VISU user.info sysinit: /lib/genohm-scada/storage/current.db: OK
Nov 20 13:22:27 UHR-VISU kern.info kernel: [ 4.421713] EXT4-fs (mmcblk0p3): mounted filesystem with ordered data mode. Opts: nodelalloc
Nov 20 13:22:27 UHR-VISU kern.info kernel: [ 4.421271] EXT4-fs (mmcblk0p3): recovery complete
Nov 20 13:22:26 UHR-VISU user.info sysinit: /dev/mmcblk0p3: ********** WARNING: Filesystem still has errors **********
Nov 20 13:22:26 UHR-VISU user.info sysinit: e2fsck: unable to set superblock flags on /dev/mmcblk0p3
Nov 20 13:22:26 UHR-VISU user.info sysinit: Run journal anyway? yes
Nov 20 13:22:26 UHR-VISU user.info sysinit: Superblock needs_recovery flag is clear, but journal has data.
Nov 20 13:22:25 UHR-VISU user.info sysinit: /dev/mmcblk0p3: recovering journal
Nov 20 13:22:25 UHR-VISU user.info sysinit: e2fsck 1.43.4 (31-Jan-2017)
Nov 20 13:22:25 UHR-VISU kern.info kernel: [ 2.650736] fec 2188000.ethernet eth0: Freescale FEC PHY driver [SMSC LAN8710/LAN8720] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 1.578946] fec 2188000.ethernet eth0: Freescale FEC PHY driver [SMSC LAN8710/LAN8720] (mii_bus:phy_addr=2188000.ethernet:00, irq=-1)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.986808] EXT4-fs (mmcblk0p2): re-mounted. Opts: nodelalloc
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.552528] Freeing unused kernel memory: 160K (c03ba000 - c03e2000)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.551947] VFS: Mounted root (ext3 filesystem) readonly on device 179:2.
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.551846] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.550971] EXT4-fs (mmcblk0p2): recovery complete
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.449026] EXT4-fs (mmcblk0p2): write access will be enabled during recovery
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.448996] EXT4-fs (mmcblk0p2): INFO: recovery required on readonly filesystem
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.370497] mmcblk0: p1 p2 p3
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.369178] mmcblk0: mmc0:59b4 USD 3.73 GiB
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.368207] mmc0: new high speed SDHC card at address 59b4
Nov 20 13:22:24 UHR-VISU kern.warn kernel: [ 0.362121] mmc0: host does not support reading read-only switch, assuming write-enable
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.344605] Waiting for root device /dev/mmcblk0p2...
Nov 20 13:22:24 UHR-VISU kern.err kernel: [ 0.344532] Warning: unable to open an initial console.
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.344114] vdd3p0: disabling
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.343401] rtc-pcf85263a 0-0051: setting system clock to 2017-11-20 13:22:23 UTC (1511184143)
Nov 20 13:22:24 UHR-VISU kern.err kernel: [ 0.340020] cpu cpu0: dev_pm_opp_get_opp_count: device OPP not found (-19)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.338701] can: raw protocol (rev 20120528)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.338460] NET: Registered protocol family 29
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.338290] can: controller area network core (rev 20120528 abi 9)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.338225] NET: Registered protocol family 17
Nov 20 13:22:24 UHR-VISU kern.warn kernel: [ 0.322473] 2198000.adc supply vref not found, using dummy regulator
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.306610] mmc0: SDHCI controller on 2194000.usdhc [2194000.usdhc] using ADMA
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.269903] sdhci-esdhc-imx 2194000.usdhc: No vqmmc regulator found
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.269878] sdhci-esdhc-imx 2194000.usdhc: No vmmc regulator found
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.269688] /soc/aips-bus@02100000/usdhc@02194000: voltage-ranges unspecified
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.267951] sdhci-pltfm: SDHCI platform and OF driver helper
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.267936] sdhci: Copyright© Pierre Ossman
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.267912] sdhci: Secure Digital Host Controller Interface driver
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.267353] usbcore: registered new interface driver btusb
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.266469] imx2-wdt 20bc000.wdog: timeout 60 sec (nowayout=0)
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.264960] i2c /dev entries driver
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.264740] rtc-pcf85263a 0-0051: rtc core: registered rtc-pcf85263a as rtc0
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.260406] hub 2-0:1.0: 1 port detected
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.260297] hub 2-0:1.0: USB hub found
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.259037] usb usb2: SerialNumber: ci_hdrc.1
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.259016] usb usb2: Manufacturer: Linux 4.4.73 ehci_hcd
Nov 20 13:22:24 UHR-VISU kern.info kernel: [ 0.258994] usb usb2: Product: EHCI Host Controller

What's on /dev/mmcblk0p3 ?
Is it OK it's been mounted as ro only and not remounted?