dhtmlx.extend_api is not a function

I purchased the dhtmlxGrid pro version and installed it following the instructions exactly.

However, I cannot get it to work properly because of this error:

dhtmlx.extend_api is not a function

Any idea what I might be doing wrong?

Please, make sure that you’ve included the required js files from your dhtmlx package.
For the dhtmlxGrid package you need to include dhtmlxgrid.js and dhtmlxgrid.css files from the “codebase” folder to your page:

Please, make sure that you are not including any other dhtmlx js,css files together with the mentioned. If the problem still occurs for you please, provide with a complete demo, where the problem can be reconstructed locally. Here you can find a tutorial about creating a complete demo: [docs.dhtmlx.com/tutorials__auxi ... pport.html](https://docs.dhtmlx.com/tutorials__auxiliary_docs__demo_for_support.html)