Hello,

Please check server requirements on item page or documentation.

Lastly check server error logs and let me know the error details so that I suggest solution.

Thanks

Sorry, the server does not throw errors.
Only the browser when displaying the products.

Is the MySQL mode `only_full_group_by` disabled as mentioned in the documentation?

I solved the issue, it was a problem of incompatibility with MySql, I changed the PHP version from 7.4 to 7.2 and modified the system / database / drivers / mysqli / mysqli_driver.php file (lines 161 to 172 to disable the option only_full_group_by and I think the web is loading well now, is this correct, won't it cause me any problems?

I won't suggest modify any file form system folder as those are CodeIgniter files. You can use php7.2 and disable the MySQL `only_full_group_by ` mode on your server.

Ok thanks.