Hiya
Solution:
Firstly, the error message suggests that there may be an issue with the application's exception log. The first step would be to check the log to see if there are any specific details about the error. This can usually be found in the "var/log" folder of your Magento installation.
If there are no specific details in the log, the next step would be to check the configuration settings for configurable products. Make sure that all the necessary attributes and options are selected for each product. It is also important to make sure that the configurations are set up correctly, including pricing and inventory settings.
In some cases, the error could be caused by a conflict with other modules or extensions. Try disabling any recently installed extensions and see if the issue persists. You can also try reindexing your catalog after making any changes to the configurations.
If the above steps do not resolve the issue, it is possible that there may be a problem with the product categories. Check if the categories are properly assigned to the configurable products. Sometimes, having incorrect or missing category assignments can cause errors on the front end.
Additionally, check if there are any updates or patches available for your Magento version. Installing the latest updates can fix any known issues and bugs.
If the problem still persists, it is best to seek help from a Magento developer or contact Magento support for further assistance. They will be able to analyze the issue more thoroughly and provide a more accurate solution.
In summary, to fix the error with configurable products not displaying on the front end, check the exception log, review product configurations and categories, disable conflicting extensions, reindex the catalog, and update Magento to the latest version. If the issue persists, seek help from a professional.
Best regards,
Giáp Văn Hưng