Troubleshooting TCPDF ERROR: [Image] Unable to get the size of the image
When downloading a PDF copy of a client's invoice after customizing the
invoicepdf.tpl template file, you may encounter a
TCPDF ERROR message:
TCPDF ERROR: [Image] Unable to get the size of the image: https://www.example.com/images/image-name.png
This error indicates that your server cannot use the cURL library function to load the logo image for inclusion in the PDF invoice. This could be due to a firewall configuration or similar security measures on the server or network.
To troubleshoot this issue:
- SSH in to your WHMCS installation's server.
- Execute the following command, replacing
https://www.example.com/images/image-name.pngwith the URL of the logo image in the error message:
curl -v https://www.example.com/images/image-name.png
A successful result will include a 200 HTTP response code. For example:
* Connection state changed (MAX_CONCURRENT_STREAMS == 100)! < HTTP/2 200 < date: Mon, 04 Oct 2021 10:01:22 GMT < server: Apache/2 < last-modified: Mon, 29 Mar 2021 06:02:17 GMT < etag: "42e6-5bea69fba6425" < accept-ranges: bytes < content-length: 17126 < cache-control: max-age=259200 < expires: Thu, 07 Oct 2021 10:01:22 GMT < content-type: image/png