The vscode.TextEdit.replace-function is a static member of the TextEditr-class. Calling it with new was only possible because vscode used to compile its TypeScript sources to ES5, not ES6. Now calling a static class function using the new-keyword isn't possible anymore and results in an error (like Microsoft/vscode#69533).

Please update and use vscode.TextEdit.replace without the new keyword.

Thanks and HappyCoding!