Free Version Install Error

Hi there,

I installed Rank Math on by development site within WAMP server on a Windows 10 Enterprise machine. PHP version 8.2.0 and the usual extensions installed.

I keep getting “Installation failed: Download failed. Unauthorized” and if I go to the plugin setup page I get this…

Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function “wp_print_media_templates” not found or invalid function name in C:\wamp64\www\moomilkman\wp-includes\class-wp-hook.php on line 308

TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, function “wp_print_media_templates” not found or invalid function name in C:\wamp64\www\moomilkman\wp-includes\class-wp-hook.php on line 308
Call Stack
# Time Memory Function Location
1 0.0007 371736 {main}( ) …\admin.php:0
2 0.9124 15278608 do_action( $hook_name = ‘admin_init’ ) …\admin.php:175
3 0.9124 15278824 WP_Hook->do_action( $args = [0 => ”] ) …\plugin.php:517
4 0.9124 15278824 WP_Hook->apply_filters( $value = ”, $args = [0 => ”] ) …\class-wp-hook.php:332
5 1.0003 15373984 RankMath\Admin\Registration->render_page( ” ) …\class-wp-hook.php:308
6 1.0191 15509608 include_once( ‘C:\wamp64\www\moomilkman\wp-content\plugins\seo-by-rank-math\includes\admin\wizard\views\footer.php ) …\class-registration.php:243
7 1.0342 15513328 wp_print_footer_scripts( ) …\footer.php:18
8 1.0342 15513328 do_action( $hook_name = ‘wp_print_footer_scripts’ ) …\script-loader.php:2163
9 1.0342 15513544 WP_Hook->do_action( $args = [0 => ”] ) …\plugin.php:517
10 1.0342 15513544 WP_Hook->apply_filters( $value = ”, $args = [0 => ”] ) …\class-wp-hook.php:332

No other plugin has presented an issue with download or install.

WordPress: 6.1.1
Theme: OceanWP Child – OceanWP
Plugins: Breeze, Classic Editor, Classic Widgets, Elementor, Elementor Pro, Gravity Forms, Ocean Extra, and Smush.

Any idea? Because I’ve not a clue.

Cheers,
Nick.