TCPDF error: Unsupported image type: 9&chl=spd%20(4)|cdu%20(5)|pds/die%20linke%20(2)|fwgk%20(2)|wgkl%20(3)|igj%20(1)&chco=cc0000,cccccc,ff99ff,99ffff,add8e6,9999ff