[Illuminate\Database\QueryException]
SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too l
ong; max key length is 767 bytes (SQL: alter table `users` add unique `users_em
ail_unique`(`email`))
[PDOException]
SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too l
ong; max key length is 767 bytes

The easier way to resolve this:

Solution 1:

// config/database.php
 'mysql' => [
            // ...
            // Lets stick to utf-8 until we get MySql 5.7.x on server
            'charset' => 'utf8',
            'collation' => 'utf8_unicode_ci',
        ],
Just change the charset, dont go with mb4.
Solution 2:

As outlined in the Migrations guide to fix this all you have to do is edit your AppServiceProvider.php file and inside the boot method set a default string length:

use Illuminate\Support\Facades\Schema;

public function boot()
{
Schema::defaultStringLength(191);
}

Check this link