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I would like to ask about any problems with my Rig and the charges

Hello! Please tell me as a beginner.

I don’t understand what is listed below.

My Rig is no longer able to mine properly.
“ERROR: Invalid credentials” was displayed on the HiveOS terminal.
On the HiveOS management screen, “Locked” and “$-5.32” were displayed.

Will my rig be able to mine again if I pay $5.32?
I would like to know the specific method for paying the balance.

I use 11 Rigs.
How much does HiveOS cost per month?
Also, can fees be automatically paid using assets obtained through mining?

Is it possible to send assets obtained through mining to METAMASK?