ValueError: imagecreatetruecolor(): Argument #1 ($width) must be greater than 0 in imagecreatetruecolor()

Also, I got this error on the console whenever I refresh the image.

http://local-local.docksal.site/image-captcha-generate/70/1690235624 500 (500 Service unavailable (with message))
Image (async)
attr @ jquery.min.js?v=3.6.3:2
B @ jquery.min.js?v=3.6.3:2
attr @ jquery.min.js?v=3.6.3:2
(anonymous) @ image_captcha_refresh.js?v=9.5.9:33
c @ jquery.min.js?v=3.6.3:2
fireWith @ jquery.min.js?v=3.6.3:2
l @ jquery.min.js?v=3.6.3:2
(anonymous) @ jquery.min.js?v=3.6.3:2
load (async)
send @ jquery.min.js?v=3.6.3:2
ajax @ jquery.min.js?v=3.6.3:2
E.<computed> @ jquery.min.js?v=3.6.3:2
(anonymous) @ image_captcha_refresh.js?v=9.5.9:28
dispatch @ jquery.min.js?v=3.6.3:2
y.handle @ jquery.min.js?v=3.6.3:2

any help will be appreciated.
Thank you.

Thanks, could someone prepare a MR to fix this for the next release, combined with 🐛 Error float>int conversion after update to version 2.0.3 Fixed

Tested the module with version 2.x-dev on Drupal 10 with PHP 8.1 and the issue seems to not reproducible (enabled on all forms).

That's weird. I also tried the

2.0.3 Version.
PHP: 8.1
Drupal: 9.5.9

I will try with the 2.x-dev and keep update here.

@jungKunwar looks like a local issue. Please check and resave your image captcha settings.
What values do you use for

• image_captcha_font_size
• image_captcha_character_spacing

and which font did you choose?

/**
* Helper function for calculating image height and width.
*
* They are based on given code and current font/spacing settings.
*
* @param string $code
* The utf8 string which will be used to split in characters.
*
* @return array
* [$width, $heigh].
*/
function _image_captcha_image_size($code) {
$config = \Drupal::config('image_captcha.settings');
$font_size = (int) $config->get('image_captcha_font_size');
$character_spacing = (float) $config->get('image_captcha_character_spacing');
$characters = _image_captcha_utf8_split($code);
$character_quantity = count($characters);

// Calculate height and width.
$width = $character_spacing * $font_size * $character_quantity;
$height = 2 * $font_size;

// Return the values as full pixel values (no floats):
return [(int) $width, (int) $height];
}