SSH error iPhone 4S ios 9.3.6

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Describe the issue
REQUIRED -
A clear and concise description of what the issue is and what you have already tried to fix the issue.

Screenshots

Computer (please complete the following information):
REQUIRED -

• Computer Model [Macbook Pro 2017]
• MacOS Version [10.14.6]
• Python Version [Python3.9]
• Vieux Version [Latest]

iOS Device (please complete the following information):
REQUIRED -

• Device: [e.g. iPhone4,1]
• Desired Version: [e.g. iOS 6.1.3]

Additional context
Every time when I try to downgrade I get SSH error messages.
My iPhone is jailbroken and I have OpenSSH installed, ssh root@IP works just fine.

I'm following all instructions with the homebutton and the detaching up to the letter.

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Fixed it.

I typed 'sudo codesign --sign - --force --deep' in Terminal and it works fine, downgrade successful, thanks!.