Hi @JorgeDDW without more insight it's difficult for me to provide you with an accurate solution, but here are my guesses:
Are you using docker or a LAMP stack?
Do you have all bank's credentials it should work.
Did you set a Response Url in WordPress Admin?
Also, it's been a few months since I created/used this plugin, things may have changed on the bank's end. The bank should assign an agent able to inform you about any changes in their API 6-8months from now.
Hey @mitramejia Im trying to use your plugin that is in
src/woocommerce-gateway-azul/
I get error 500 on server... Do i have to do any other setup?