Cesium.load is not a function

The error message "Cesium.load is not a function" typically means that the function "load" is not defined in the Cesium library. This could be caused by a few different things:

1. The Cesium library may not be properly loaded or initialized in your application.
2. The version of Cesium you are using may not have the "load" function. Make sure you are using the correct version of the library.
3. There may be a typo or other syntax error in your code that is preventing the "load" function from being recognized.

To troubleshoot this issue, you can try the following:

1. Check that the Cesium library is properly loaded and initialized before you try to use the "load" function. You can do this by checking the network tab of your browser's developer tools to make sure the library is loaded without errors, and by checking that the Cesium object is defined in your code.
2. Make sure you are using the correct version of Cesium that includes the "load" function.
3. Check your code for any syntax errors or typos that may be preventing the "load" function from being recognized.