Google Blocks and Zoho Mail Problems

Hello my friends, we are having a lot of problems trying to create a flow that starts in a custom app that has a form that receive client contact email and creates a contact in zoho books, them email the clients with the provided contact info and client ID, when we try to integrate Gmail Bloc to it the flow is not being executed, also happens with google sheets, the flows are not being triggered when a google block is in it, we checked and the flow is on, we migrated the domain email to zoho email to have the flow working but we can create the connection between the flow and the Zoho mail, when we press authorize button nothing happens, only a blank page appears.

Thank you!