No, the HtmlTemplateInvoice() class always expects an object of type OrderInvoice, so there will never be a problem. The HtmlTemplateDeliverySlip() class accepts both types of objects (Order or OrderInvoice). This historical code error only triggered a warning up to PHP 7.2, but beyond that, it's a fatal error.

Hello, PhenixSuite will only load the latest versions offered once tested and debugged which is not yet the case for the latest version of Sumup

Yes if you have the debug mode activated. Replace the /classes/Configuration.php by the joined file. Configuration.php

No you are not stupid and this bug has been there for 2 years v16 will be corrected (The Attribute class no longer exists because it is a reserved word since PHP8 and this line had escaped me) Thanks for your feedback

Thanks for your help The correction has been made for future PhenixSuite versions.

@Bitfarmer Thanks !