I'm using the wordpress developer plugin, and getting some errors installing internal plugins. Using Localhost and MAMP
Strict Standards: Declaration of Automattic_Developer_Empty_Upgrader_Skin::request_filesystem_credentials() should be compatible with WP_Upgrader_Skin::request_filesystem_credentials($error = false, $context = false, $allow_relaxed_file_ownership = false) in /Applications/MAMP/htdocs/wordpress/wp-content/plugins/developer/includes/class-empty-upgrader-skin.php on line 5 1
I find a lot of people with the same problem, but until now I didn't find any fix.
I had the same issue. I found this solution https://github.com/Automattic/developer/commit/69423f8a479a6d343e146a8b20d77b7f9ac66835.
You just to add $context = false, $allow_relaxed_file_ownership = false in your class-empty-upgrader-skin.php file which you can locate in plugins/developer/include folder.