Welcome to ECF, although I'm sorry about your reason for being here.
I can't find that error code in the manual. My guess would be that it was discharged or at a low charge when you last used it, and it's now dropped below the safe or recoverable voltage. I'm afraid that would mean that the battery is toast.
For future reference,
batteries that are not in use fare best when about 1/2 charged. A small battery like that should be checked every month or two.