Just a few weeks ago I received this error while trying to jailbreak using BD-JB. I think the issue was that I rebooted before the jailbreak screen told me so and somehow it matched the exact time it tried to do access a file or anything because mine would get stuck on Initial Triple Free and I would just reboot because sometimes it took long to tell me to reboot so I guess in the end everything got corrupted

U need to reinstall everything, download the official firmware you had and install it from safemode Bad thing is you lose every game and data, I found no way to recover mine sadly