when I try to apply coupon code in server its showing 403 forbidden error . But its working on local machine. below the error. please check it.
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>403 Forbidden</title>
</head><body>
<h1>Forbidden</h1>
<p>You don't have permission to access
/Amberly/rest/default/V1/carts/mine/coupons/AMBIBSBHTTP
on this server.<br />
</p>
<p>Additionally, a 403 Forbidden
error was encountered while trying to use an ErrorDocument to handle the request.</p>
</body></html>
how can i solve this issue?.