File unusable with CPH after changing file extension case

[ruying-suixing]

Extension Version: 2026.6.1780853884

VS Code Version: 1.124.2

Browser Version: 149.0.4022.69

Operating System: Windows11 x64

Problem Detail

I created a new file and accidentally named it f.CPP. I then renamed it to F.cpp to correct the mistake.

When trying to create a new problem with CPH, the following error occurred:

Unsupported file extension. Only these types are valid: py, cpp, cc, cxx, rs, c, java, js, go, hs, rb, cs, cj

I deleted the file and recreated F.cpp in the same directory, but the error still persists.

[ruying-suixing]