Paypal Commerce plugin not running properly

Good day,

I upgraded from 4.30 to 4.40 and installed also Paypal SmartButtons thinking that it was still under support for 4.40.
Paypal Commerce in the configuration does not replace the tags and it shows keywords.
Then in the checkout, it is the same when showing the payment options. Once selected, the next step is not loading the Paypal component.

I am running nopCommerce 4.40.4, in Linux using Linux code. I also have a custom payment plugin developed in windows, do I have to build it differently to run in Linux?

Have you read the documentation?
https://docs.nopcommerce.com/en/getting-started/configure-payments/payment-methods/paypal-commerce.html

Fixed. I had to uninstall PayPal and install again and it worked