failed to mount /cache (invalid argument)


LG F180L giving error after hard-reset

failed to mount /cache (invalid argument)

and when i want to flash via octopus it gives like this.

Welcome to Octoplus/Octopus Box LG Software version 2.1.6
————————————————————————–
Checking data…OK
Platform: LG Qualcomm
Selected port: COM3
Selected model: F180L
Searching Diagnostic Ports…OK
Reading info…
Mode: Normal
Checking data…OK
Writing NVM…Failed!

plzzzzzz help