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>

Looks like you have disabled function https://www.php.net/manual/en/function.proc-open.php
Please contact your hosting provider support for details.
I guess they are in paranoid mode and forbid all functions with "proc" inside the name.
You can check it via admin->system->settings->system->click on phpInfo() button at the heading. In the newly opened tab try to find "disable_functions" directive inside Core section.
if proc function in the list you can try deal with hosting provider. If they are reject your wish, you should to choose another mail transport, not smtp.
Actually the best approach to use inner server mailer (mail).

Also you can try to disable security_mod for your domain in the cPanel

I want to make some alterations to some of the options offered in the product page setup, like the radio buttons, etc. But where, oh where are the codes for the options? In what section where the cart is installed?

please clarify what is the aim.

Unknown Error: AbanteCart core v.1.3.3 Unsupported operand types: string + float in <b>/home/loveyou7petsuper/public_html/core/lib/tax.php</b> on line <b>228</b>

you can try to downgrade from php8 to php7.4 to solve an issue.

We did not realized this feature in the devtools yet. Will be soon. To clone extension template just copy directory "bootstrap5" to "your_new_template_text_id" and rename all files and subdirectories  "bootstrap5" to "your_new_template_text_id" (usually it's a language subdirectory in admin and sf) Also open layout.xml file from template root directory and replace all "bootstrap5"  words with "your_new_template_text_id" (BS5 too)  After then you can install your new template.

please give us full test of error. What file with line 89?

you can check how we use phpunit testing in the abantecart next generation.
See this file tree https://github.com/abantecart/abantecart_2.0/tree/master/abantecart/abc
You can find phpunit configuration file https://github.com/abantecart/abantecart_2.0/blob/master/abantecart/abc/phpunit.xml
Just create yours and start to create test classes.

please check this bugfix

But when i try to upgrade the extension

please clarify how you did this. i mean how you did upgrade of extension.