API not found

[applibs]

I used search function which generate this url:
https://api.onedrive.com/v1.0/drives/MYDRIVEID/root/view.search/q=file.txt
but always I got message "API not found".
Other call API works well.
What is wrong?

[applibs]

OK, I found solution. It looks like Guzzle client will not encode query when q = aaa/bbb.
Soo, putting urlencode(utf8_encode($file)) will fix this problem.