In my objective c application i used dropbox official sdk to upload files on my dropbox. one of my user gets error while uploading and when i debug the data i found that is a network error and it's 404.
The error content is this:
<!DOCTYPE html><LF>
<html><LF>
<head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><LF>
<title>Dropbox - 4xx</title><LF>
<link href="https://cfl.dropboxstatic.com/static/css/error.css" rel="stylesheet" type="text/css"/><LF>
<link rel="shortcut icon" href="https://cfl.dropboxstatic.com/static/images/favicon.ico"/><LF>
<LF>
</head><LF>
<body><LF>
<div class="figure"><LF>
<img src="https://cfl.dropboxstatic.com/static/images/illustration_catalog/404_error-illo.png" srcset="https://cfl.dropboxstatic.com/static/images/illustration_catalog/404_error-illo@2x.png 2x" alt="Error: 4xx"/><LF>
</div><LF>
<div id="errorbox"><LF>
<div class="not-found"> <h1>Error (4xx)</h1> We can't find the page you're looking for. <div class="not-found--links"> Here are a few links that may be helpful: <ul> <li><a href="https://www.dropbox.com/home?_tk=fof">Home</a></li> <li><a href="https://www.dropbox.com/help?_tk=fof">Help center</a></li> <li><a href="https://www.dropbox.com/login?_tk=fof">Sign in</a></li> <li><a href="https://www.dropbox.co<CR><LF>
What is the actual problem?