Cannot install altstore due to server error

[kylewhirl]

(3020) Failed to perform authentication handshake with server. Running iPadOS 18.5 and cannot install altstore

AltServer could not sign in with your Apple ID. Failed to perform authentication handshake with server.

Error Description
AltServer could not sign in with your Apple ID. Failed to perform authentication handshake with server.

Failure
AltServer could not sign in with your Apple ID.

Failure Reason
Failed to perform authentication handshake with server.

Never had this issue before using altstore for a few years now