PayPal Express recurring contributions are not recorded and no confirmation email is sent
An exception is thrown upon receiving an IPN for a PayPal Express recurring contribution.
The contribution is therefore not recorded and no confirmation email is sent.
There is nothing to indicate lack of support of this feature to a user defining an event who might enable recurring contributions and enable the PayPal Express payment processor.
I will submit a PR shortly.
To upload designs, you'll need to enable LFS. More information