grid.render is not a function

The error message "grid.render is not a function" typically occurs when you are trying to call the "render" method on an object that does not have such a method.

Without more context, it's difficult to determine the root cause of this error. However, here are a few possible reasons and solutions:

1. The object you are calling "render" on is not an instance of a class that has a "render" method. Double-check that you are calling "render" on the correct object.

2. The "render" method may not be defined or imported correctly. Make sure that the method is defined and exported properly in the relevant module and imported correctly in the file you are using it in.

3. The "render" method may be misspelled or have a different name. Check the documentation or source code for the object you are using to confirm the correct method name.

I hope this helps!