Implement an image in invoice.php doesn't work

-- HikaShop version -- : 4.5.0
-- Joomla version -- : 3.10.6
-- PHP version -- : 7.4.3
-- Browser(s) name and version -- : every browser
-- Error-message(debug-mod must be tuned on) -- : Unable to get the size of the image [ www.schafstour.de/plugins/hikashop/attac.../logo-schafstour.jpg ]

Hi,

i want to implement a logo in the PDF Invoice (work with the plugin attachinvoice).
Therefore I added the img-html-Code in the invoice.php but the the system get out the error:
Unable to get the size of the image [ www.schafstour.de/plugins/hikashop/attac.../logo-schafstour.jpg ]

So I tried different kinds of implementation, only <img src="" />, or per echo and also by function $logo, but no way ist working, always the same error. I change the image form jpeg to png and added the width and height also, noop!

So, do you have any idea, why it is not working or have a good explanation how to add the logo?

thanks,
Mapache

Thanks a lot.
That was my thought also. So I get in contact with my provider...

regards
Mapache

o.k. it was problem with the PHP.ini configuration.
No wit his working.
Thanks.