Hello.
Make sure your php version is 7.3 but the preferred solution will update your AbanteCart
https://abantecart.atlassian.net/wiki/spaces/AD/pages/3768390/AbanteCart+System+Requirements

Not sure how to fix this issue or what to do to fix this but I have tons of this entry in my error logs.
2024-03-25 13:08:20 - Unknown Error: AbanteCart core v.1.3.1 Unsupported operand types: string * string in <b>/XXXXXXX/currency.php</b> on line <b>228</b>

How do I fix this?
Any help is appreciated.
Thank you

When I press the continue button when I have already completed the registration form, it looks like this in the image that I will attach

But I go into the administrative panel and see that the account has been created. but it is an inconvenience that the website remains blank and the person does not know if the account was actually created successfully

hi,
is it your v1.3.4 after upgrade or it's a newly installed 1.3.4 ?

please check file public_html/core/init.php
these lines must be there

const DIR_VENDOR = DIR_ROOT . DS . 'vendor' . DS;

require DIR_VENDOR.'autoload.php';

SPANISH
hola al crear una cuenta, se llenan todos los campos para el registro y cuando ya le doy registrar la pagina carga y queda en blanco y me genera el siguiente error en el registro

2024-04-01 23:46:10 - Unknown Error: AbanteCart core v.1.3.4 Call to undefined function Symfony\Component\Mailer\Transport\Smtp\Stream\proc_open() in <b>/home/electron/public_html/vendor/symfony/mailer/Transport/Smtp/Stream/ProcessStream.php</b> on line <b>41</b>

mire el archivo y veo todo bien. lo reemplaze nuevamente por el original a ver si habia algun error y sigue persistiendo.
alguien me puede colaborar con este error.

aclaro que la cuenta si se registra, pero por supuesto que la persona que se registra no sabe si se creo o no, ya que no genera la web donde realmente creo la cuenta . ayudenme gracias.

ENGLISH
Hello, when creating an account, all the fields for registration are filled out and when I click to register, the page loads and remains blank and generates the following error in the registration

2024-04-01 23:46:10 - Unknown Error: AbanteCart core v.1.3.4 Call to undefined function Symfony\Component\Mailer\Transport\Smtp\Stream\proc_open() in <b>/home/electron/public_html /vendor/symfony/mailer/Transport/Smtp/Stream/ProcessStream.php</b> on line <b>41</b>

I look at the file and I see everything fine. I replaced it again with the original to see if there was any error and it still persists.
Can someone help me with this error.

I clarify that the account is registered, but of course the person who registers does not know if it was created or not, since it does not generate the website where the account was actually created. help me thanks.