Hello Dave,
I owe you an excuse and an explanation. Meanwhile, I tried to shortcut my problem and added a plugin, I switched from using paypal standart of woocommerce to paypal express plugin. Unfortunately, it had some particular behavior, that I prefer to work with standart paypal woocommerce settings.
In my understanding, PayPal standart woocommerce calls Paypal account via email, but doesnt use PayPal API. I added PayPal identity token and API credentials, but in PayPal standart woocommerce they are used only for refunds.
Do you have an idea what could go wrong in my case?
Thank you very much in advance!