My laptop was upgraded to Windows 10 build 1903 two days ago. Since then Apache has started OK and I do not seem to have a port 80 clash or similar issues, but the Music editing system I have been using for years now refuses to start, with the following error message in the browser (Chrome, but same with Edge), when I type my usual command "localhost/music.php":
"Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0
Fatal error: Unknown: Failed opening required 'C:/Users/steve/OneDrive/xampp/htdocs/music.php' (include_path='C:\Users\steve\OneDrive\xampp\php\PEAR') in Unknown on line 0"
Furthermore I get a similar error if I try to start any PHP, for example pressing the "PHPinfo" tab on the XAMPP Dashboard:
"Warning: Unknown: failed to open stream: No such file or directory in Unknown on line 0
Fatal error: Unknown: Failed opening required 'C:/Users/steve/OneDrive/xampp/htdocs/dashboard/phpinfo.php' (include_path='C:\Users\steve\OneDrive\xampp\php\PEAR') in Unknown on line 0"
I'm a simple user of this software rather than a developer, and am at a loss to understand why this has suddenly happened. I'd be grateful for any guidance.