Hello, I have a problem with the Redsys-Sermepa payment plugin. It gives redsys signature error (SIS0042) and technical support believes that either the plugin is wrong or requires some special configuration.
I have security certificates at ip and domain level and the configuration data is correct.
Do you know if require any specific configuration at the web.config? In theory it complies with the sha256 encryption, right?
Thank you.