The source code is incorrect after wordpress is installed.

After installing wordpress, the source code error is Prompted. I just uploaded wordpress4.01 to the host and opened the domain name. the following message is displayed:
Fatal error: Call to undefined function request_filesystem_credentials () in/data/home/htdocs/wp-admin/des/class-wp-upgrader-skins.php on line 47
Find the source code as follows:

public function request_filesystem_credentials($error = false) {$url = $this->options['url'];$context = $this->options['context'];if ( !empty($this->options['nonce']) )$url = wp_nonce_url($url, $this->options['nonce']);return request_filesystem_credentials($url, '', $error, $context); //Possible to bring inline, Leaving as is for now.}

The prompt is the request_filesystem_credentials ($ url, '', $ error, $ context) function of the return Row. This function is not found in the file, however, there are several different functions than its cognominal parameters. Baidu does not mean php does not support overloading? I don't know how to deal with php. Does anyone know?

Reply to discussion (solution)

Check if the wp-admin/uplodes/file. php file is not in

Check if the wp-admin/uplodes/file. php file is not in

In

Check if the wp-admin/uplodes/file. php file is not in

The problem has been solved. it seems that a problem occurred during the upload, and the upload is completed again.