Undefined property: stdClass::$sections

If you want to avoid a PHP Notice, override the file class-admin.php on your Premium Plugin.

And replace the entire function fetch_plugin()

	/**
	 * @return object
	 */
	private function fetch_plugin() {
		static $data;

		if( $data === null ) {
			$client = $this->get_api_client();
			try {
				// @NOTE this should probably be dynamic
				$data = $client->request( 'GET', '/plugins/premium?format=wp' );
				if ( !empty($data->sections)) {
					$data->sections = (array) $data->sections;
				}
				if( ! empty( $data->banners ) ) {
					$data->banners = (array) $data->banners;
				}

				// add activation token to download URL's
				$license = $this->load_license();
				if( ! empty( $license->token ) ) {

					if (!empty($data->package)) {
						$data->package = add_query_arg( array( 'token' => $license->token ), $data->package );
					} else {
						$data->package = add_query_arg( array( 'token' => $license->token ), null );
					}
					$data->download_link = $data->package;
				} else {
					$data->sections['changelog'] = '<div class="notice notice-warning"><p>' . sprintf( 'You will need to <a href="%s">activate your plugin license</a> to install this update.', admin_url( 'admin.php?page=mailchimp-for-wp-other' ) ) . '</p></div>' . $data->sections['changelog'];
					$data->upgrade_notice = 'You will need to activate your plugin license to install this update.';
					$data->package = '';
				}
			} catch( Exception $e ) {
				$data = (object) array();
			}
		}

Hi, is not the best solution I’m with you, but was the only place to put the code.

The latest version of the premium plugin, the 4.5.5.