Hello. I rarely use the Billing module for my small business. Since my last invoice in November 2025, I have made all the Updates to ISPConfig and my Ubuntu server. Today I wanted to create a new invoice, but when finalising the invoice, no PDF was created. I used the text.php in the invoice template directory and was able to render the new invoice. I tested the standard templates, but these did not render a PDF. How can I debug this? I get no errors in the browser, and I did not find anything in the logs I checked. Besides updates, I did not change anything on the server or ISPC.
Which Billing Module version do you use? My guess is you use a newer PHP version now or updated your server OS, and your Billing Module version is too old for that PHP version.
