router says me these
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Configuration
Installing luci-app-adblock (git-20.259.58095-dc51a2f-1) to root...
Downloading http://downloads.openwrt.org/releases/18.06.8/packages/mips_24kc/luci/luci-app-adblock_git-20.259.58095-dc51a2f-1_all.ipk
Installing luci-lib-jsonc (git-20.259.58095-dc51a2f-1) to root...
Downloading http://downloads.openwrt.org/releases/18.06.8/packages/mips_24kc/luci/luci-lib-jsonc_git-20.259.58095-dc51a2f-1_mips_24kc.ipk
Collected errors:
* wfopen: //usr/lib/opkg/info/luci-lib-jsonc.control: Read-only file system.
* wfopen: //usr/lib/opkg/info/luci-lib-jsonc.postinst: Read-only file system.
* wfopen: //usr/lib/opkg/info/luci-lib-jsonc.prerm: Read-only file system.
* wfopen: /usr/lib/lua/luci/jsonc.so: Read-only file system.
* pkg_write_filelist: Failed to open //usr/lib/opkg/info/luci-lib-jsonc.list: Read-only file system.
* opkg_install_pkg: Failed to extract data files for luci-lib-jsonc. Package debris may remain!
* opkg_install_cmd: Cannot install package luci-app-adblock.
Blockquote