Unable to sign in for Stackblitz

[josslzr]

Description of Bug

Hi whenever I try to sign in for Stackblitz using my GitHub account it does not allow me to do so, I have tried following the other steps.

Steps to Reproduce

1. Go to https://stackblitz.com/
2. Click on Sign In button on the header
3. Click on Continue with GitHub button
4. Received the error:

It looks like you're attempting to sign in to your existing StackBlitz account using a different provider
Please proceed by signing in with the provider you originally used, then you can add your new provider in the settings

If you think this is a bug/problem on our end, please file an issue over at https://github.com/stackblitz/core

Expected Behavior

Able to use my account to login into Stackblitz.

Additional Context/Questions
I have tried the workarounds mentioned here #1402 but I am unable to make it work.