File with the extension .cu stopped being recognized

Good day to all colleagues. Recently I noticed one unpleasant problem in my system, namely files that had a CUDA extension called *.cu stopped being displayed and be determined. I work in Visual Studio Code and I don’t know how such a problem can be fixed. I couldn’t find anything about this on the Internet. For example, I threw off a screenshot at the bottom in which it is clearly visible that a file with the extension *.c is recognized. But the file with the *.cu extension has stopped and is opened by default with a regular text editor.