ErrorSoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL:

On my site I see the following message:
I checked in the server: the soap feature is enabled.
The WordPress version: 5.9 and plugin version: 1.6.5, compatible with 5.8.3.
The site was working fine. I do not know if the upgrade was the reason.
Any help is much appreciated.

This is the full error:

ErrorSoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn’t find in ‘https://paycenter.piraeusbank.gr/services/tickets/issuer.asmx?WSDL’ in /home/mypudtpr/public_html/wp-content/plugins/woo-payment-gateway-for-piraeus-bank/wooshop-piraeus.php:571 Stack trace: #0 /home/mypudtpr/public_html/wp-content/plugins/woo-payment-gateway-for-piraeus-bank/wooshop-piraeus.php(571): SoapClient->SoapClient(‘https://paycent…’) #1 /home/mypudtpr/public_html/wp-content/plugins/woo-payment-gateway-for-piraeus-bank/wooshop-piraeus.php(739): WC_Piraeusbank_Gateway->generate_piraeusbank_form(21397) #2 /home/mypudtpr/public_html/wp-includes/class-wp-hook.php(307): WC_Piraeusbank_Gateway->receipt_page(21397) #3 /home/mypudtpr/public_html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters(”, Array) #4 /home/mypudtpr/public_html/wp-includes/plugin.php(474): WP_Hook->do_action(Array) #5 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/templates/checkout/order-receipt.php(44): do_action(‘woocommerce_rec…’, 21397) #6 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/includes/wc-core-functions.php(345): include(‘/home/mypudtpr/…’) #7 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/includes/shortcodes/class-wc-shortcode-checkout.php(208): wc_get_template(‘checkout/order-…’, Array) #8 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/includes/shortcodes/class-wc-shortcode-checkout.php(59): WC_Shortcode_Checkout::order_pay(21397) #9 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/includes/class-wc-shortcodes.php(72): WC_Shortcode_Checkout::output(”) #10 /home/mypudtpr/public_html/wp-content/plugins/woocommerce/includes/class-wc-shortcodes.php(95): WC_Shortcodes::shortcode_wrapper(Array, ”) #11 /home/mypudtpr/public_html/wp-includes/shortcodes.php(356): WC_Shortcodes::checkout(”, ”, ‘woocommerce_che…’) #12 [internal function]: do_shortcode_tag(Array) #13 /home/mypudtpr/public_html/wp-includes/shortcodes.php(228): preg_replace_callback(‘/\\[(\\[?)(woocom…’, ‘do_shortcode_ta…’, ‘

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