OR_BIBED_11 error in Google Pay API after Google approving web integration (not android)

Question

I have this button integrated in a Prestashop which was working correctly at the test stage:

Integrated Gpay button

Even if my integration has been production approved, the Gpay popup throws me this error: Gpay error

The only information I have about OR_BIBED_11 is what appears in the Google Pay's troubleshooting documentation: https://developers.google.com/pay/api/android/support/troubleshooting

How is this possible?

I have tried to re-approve the integration. Also I've verified that the keys used are correct.

Answer 1

Okay... In the moment I posted the question I've realized that a blankspace was mistakenly typed at the merchant id section...