This is a problem. It costs me a lot of time and exhausted entheusiasm.

Warning:
{
"resource": "vscode/c_cpp_properties.json",
"owner": "generated_diagnostic_collection_name#0",
"code": "768",
"severity": 4,
"message": "Unable to load schema from 'cpptools-schema:/c_cpp_properties.schema.json': Request vscode/content failed with message: cannot open cpptools-schema:/c_cpp_properties.schema.json. Detail: resource is not available.",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 1,
"endColumn": 2
}

Originally posted by @Ulysiss in #4837 (comment)