Method \Extcode\TCPDF\Service\TsTCPDF::renderStandaloneView evaluates file paths into an absolute path, which is then used as the files URL. Method \TCPDF::openHTMLTagHandler checks if a file path starts with the document root and prepends it if not. When having a different web document root than TYPO3 document root, like when using helhum/secure-web, the document root gets prepended to the already absolute path.
The method should check if a file exists, thus check if the path needs to be fixed before trying to actually fix it.
Method
\Extcode\TCPDF\Service\TsTCPDF::renderStandaloneViewevaluates file paths into an absolute path, which is then used as the files URL. Method\TCPDF::openHTMLTagHandlerchecks if a file path starts with the document root and prepends it if not. When having a different web document root than TYPO3 document root, like when using helhum/secure-web, the document root gets prepended to the already absolute path.The method should check if a file exists, thus check if the path needs to be fixed before trying to actually fix it.