Simtech addon 2FA not working

Hello,

I need some advice how to fix addon. This old addon from Simtech was working fine but now stopped to generate a QR code. What are possible solutions please?
image

Thank you.

is this addon for User or Admin?

I have protect my admin login with Cloudflare Zerotrust (DNS) with the help of this forum post.
https://www.blackhatworld.com/seo/tutorial-protect-your-admin-login-with-cloudflare-zero-trust.1515428/

Maybe this could be a workaround for you?

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