Okay, so the error is
Fatal error: Uncaught exception 'SmartyCompilerException' with message 'Syntax Error in template "/var/www/prestashop/modules/customproduct/views/templates/front/details.tpl" on line 143 "<img src="modules/customproduct/images/basket/left_plain.png" title="1-Base" data-parameters='{"x": 300, "y": 300, "topped": true, "price": 20}' />" - Unexpected ": ", expected one of: "}" , " " , ATTR' in /var/www/prestashop/tools/smarty/sysplugins/smarty_internal_templatecompilerbase.php:667 Stack trace: #0 /var/www/prestashop/tools/smarty/sysplugins/smarty_internal_templateparser.php(3144): Smarty_Internal_TemplateCompilerBase->trigger_template_error() #1 /var/www/prestashop/tools/smarty/sysplugins/smarty_internal_templateparser.php(3209): Smarty_Internal_Templateparser->yy_syntax_error(2, ': ') #2 /var/www/prestashop/tools/smarty/sysplugins/smarty_internal_smartytemplatecompiler.php(105): Smarty_Internal_Templateparse in/var/www/prestashop/tools/smarty/sysplugins/smarty_internal_templatecompilerbase.php on line 667
So the problem is the data-paremeters on this line.
<img src="modules/customproduct/images/basket/left_plain.png" title="1-Base" data-parameters='{"x": 300, "y": 300, "topped": true, "price": 20}' />
But it is essential to make the module work. Do you know if there a way to make this work?
Thanks!