Cannot update expired key

My key has expired quite a while ago. I have updated it locally (extended the expiry date) with no problems and also published to a public OpenPGP server.

I a not able to update my key on keybase. When using the web UI "Update my key (I edited elsewhere)", pasting the public key block I get the following error message:
*Error: Your private key appears corrupted (no valid primary key self-signature or key(s) have expired)*

When trying to download the keybase app and logging in, I get "Invalid argument: no valid signing keys". When trying the commandline and trying to update the PGP keys, I always get "Invalid argument: no valid signing keys" as well. I can't register this laptop as a new device as I have never used it before and apparently can't register it because I don't have a valid signing key.

How to I update my expired key in keybase?

Comienza con el flujo de la interfaz web “Update my key (I edited elsewhere)” y la ruta de actualización de claves PGP desde la línea de comandos descrita en el informe, reproduciendo los errores “no valid signing keys” con una clave caducada cuya fecha de caducidad se amplió externamente. Se considera terminado cuando se acepta la clave actualizada y el usuario puede iniciar sesión o registrar el portátil como un dispositivo nuevo.

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