Double notification URLs REDSYS

Hello Sir,

I am facing an issue with REDSYS. I have recently installed YOUR REDSYS plugin. After the configuration. I tested and found that

If I goto REDSYS notification area. I see the following.

Resultado: Incorrecto

Destino + Detalle:
https://shop.myspacebarcelona.com/?wc-api=WC_MyRedsys
https://shop.myspacebarcelona.com/?wc-api=WC_MyRedsys

Look, the URL appears twice in REDSYS account and REDSYS told me there is a problem with the plugin.

Extra details:

I am using lets encrypt SSL and Forcing your pluggin to use HTTPS.

Thank you
Aamir