Unable to upgrade and install whatsapp

I didn't checked whatsapp in a few days, so I tried clicking into it, I got a message like this version of whatsapp is too old, please upgrade.

I clicked the upgrade button and was led to the google play store where I was told to sign into my google account, but it didn't allow me to.

I uninstalled whatsapp and rebooted my phone. I tried downloading whatsapp and I'm still told to sign into my google account.