Bad Gateway

Dear Madam and Sir,

since a update from PayPal we got several Errors at he shopping gateways.
It appears occasionally and we can not identify what is the exact issue.

Example:
A Custome wants to buy something in our shop. After he filled in the Details and clicks on “Buy now” he got the following error message “Bad Gateway” and he not gets redirectet to the thank you page.

After we deactivate the Plugin “Ultimate Member” it works correctly (We have the Addon Ultimate Member – WooCommerce).

It is also if the customer chooses Bank Transaction and not paypal. But we think that there is are some issues with paypal.

Best regards,
Manuel