Hello My team and I are trying to set up Coexistence mode (Embedded Signup) to connect a WhatsApp Business account with my application (provider: Maravia / Maravita). The flow consistently fails at the step "Connect your existing WhatsApp Business app".

Steps to Reproduce: - I start the Embedded Signup / Coexistence flow.

• I enter the WhatsApp Business phone number correctly (the number is active and verified).

• I click the "Next" button.

• The button becomes disabled / stuck.

• A red error indicator appears next to the step, but no descriptive error message is shown.

• I cannot proceed further in the flow.

This problem started today and we have never experienced a situation like this before with other phone numbers.

Technical Information Provided: - Session ID of the failed flow: 019dfe32-2389-7255-b92f-579f00ef24e7

• Browser used: Chrome

• Date and time of the error: 06/05/2026 12:15