503 - Service Not Available - GL-AR750s

Good Morning,

after updagrade firmware 3.0 (first version) i lost my router. Now i Access ONLY from SSH … by the WEB NOT.(503 - serice not available).

I try to understand this problem by CLI:
tail -f /var/log/lighttpd/error.log
2018-07-30 02:25:24: (gw_backend.c.478) unlink /tmp/api.socket-0 after connect failed: Connection refused
2018-07-30 02:25:24: (gw_backend.c.331) child exited: 255 unix:/tmp/api.socket-0
2018-07-30 02:25:24: (gw_backend.c.478) unlink /tmp/html.socket-0 after connect failed: Connection refused
2018-07-30 02:25:25: (gw_backend.c.331) child exited: 255 unix:/tmp/html.socket-0

I need HELP PLEASE

BANNER SSH
BusyBox v1.28.3 () built-in shell (ash)


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| W I R E L E S S F R E E D O M

OpenWrt 18.06.0-rc1, r7090-d2aa3a1b62

Even after reboot?

If not you can reset the firmware?