Echarts Not Defined Error: Troubleshooting and Solution

It seems that there is an error in the code. The error message says that "echarts is not defined". This means that the code is trying to use a variable or function named "echarts" which has not been defined or imported. \n\nTo fix this error, you need to make sure that the echarts library is properly imported or included in your HTML file. You can check if you have included the necessary script tag for echarts and that the file path is correct. \n\nOnce you have properly imported echarts, the error should be resolved and the code should work as expected.