The other error I get is that it does not show the details in the modal window, it keeps loading.

Hello,

Please check the server requirements in the documentation.pdf and error details in your server error logs. Let me know the error details from log so that I can suggest.

Thank you

Hello.
There are no problems with the server because it had version 3.4.29 installed.
It does not generate any error log for me.
In the case of the first error it was solved.
In the case of the second: "it does not show the details in the modal window"
I have these two scenarios:
1.- If you give the list either a product, purchase, sale, etc. It keeps loading the modal window, it never comes out.
2.- If you click on the "actions - details ..." button, open the page without any format.
Reviewing it seems to me that the error is in the vendor and app \ libraries folders, because I put the ones from the previous version or the 3.4.29 and it works.
Kind regards.

The latest file includes all the updated packages in vendor. There must be error in error logs :(

You can enable app logs by changing the `log_threshold` to 1 in `app/config/config.php` and then visit the pages again. Last check the latest file in `app/logs/`

Thank you

Attached log file and images with errors:
Error-1; By clicking on the product
Error-2: When hitting "Actions - Product Details"

Good afternoon friends, the problem presented with the "vendor \ endroid \ qr-code \ src \ QrCode.php" is due to the PHP version since it does not work with PHP 7 or lower, it must be updated to PHP 7.1 or higher. You can mark the query as solved, thanks.

Hello,

So the issue was due to php version. SMA require php7+ Recent update might have increased the version limit and I have added support for php7.4 and updated all the packages.

Thank you