Path : App/Providers/AppServiceProvider

Schema::defaultStringLength(191);
in AppServiceProvider didn't work for me. What worked for was editing the database.php file in config folder. Just edit

'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',
to

'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',
and it should work, although you will be unable to store extended multibyte characters like emoji.