using show remote api RESULT=FALSE ERROR_CODE=3891 WARNING=The specified request URI is incorrect.

using show remote api RESULT=FALSE ERROR_CODE=3891 WARNING=The specified request URI is incorrect.

I am using the following link:

my code works fine for docs and sheets but not ppt?

not sure what is goin on

here is my code(all php variables were received via get)

$fields = array();
$fields["url"] = $apath.'/'.$zohofn;
$fields["apikey"] ="0e9de6e5d3dd2a89d840c4e1960f98e4";
$fields["output"] ="url";
$fields["mode"] ="normaledit";
$fields["filename"] = $zohofn;
$fields["lang"] ="en";
$fields["id"] ="12345678";
$fields["format"] =$ext;
$fields["saveurl"] =$_SESSION['siteid'].'/intranet/filetree_zohosave.php';

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $uurl);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
curl_setopt($ch, CURLOPT_VERBOSE,  1);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$page = curl_exec($ch);

echo $page; 
curl_close($ch);

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