Hey,
without any further information (i.e. the data you are sending to Elasticsearch) it is nearly impossible to help. Can you add some more context around the issue? As this is an error message, that is not coming from Elasticsearch, maybe you can also ask in the forums of that specific product (datatables/laravel) that you are using.
Hope that helps as a start! Feel free to add more details, happy to take a closer look.
--Alex