Answers for "Syntax error or access violation: 1071 Specified key was too long; max key length is 767 bytes (SQL: alter table `person al_access_tokens` add index `personal_access_tokens_tokenable_type_tokenable_id_index`(`tokenable_type`, `tokenable_id`))"

Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes (SQL: alter table `users` add unique `users_email_unique`(`email`))

use Illuminate\Support\Facades\Schema;

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

Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes (SQL: alter table `users` add index `users_userable_type_userable_id_index`(`userable_type`, `userable_id`)

Update your /app/Providers/AppServiceProvider.php to contain:

use Illuminate\Support\Facades\Schema;

/**
 * Bootstrap any application services.
 *
 * @return void
 */
public function boot()
{
    Schema::defaultStringLength(191);
}

Syntax error or access violation: 1071 Specified key was too long; max key length is 1000 bytes laravel 8

Some Solution that worked for me: (Try running command after config:clear and
                                   try migrate:fresh)
1. added default string length:

use Illuminate\Support\Facades\Schema;

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

2. changing engine to 'InnoDB' inside /config/database.php
  
'mysql' => [
    ...,
    ...,
    'engine' => 'InnoDB',
 ]
  
3. If still not solved try updating 'charset' and 'collation' inside 
  /config/database.php
  
'charset' => 'utf8mb4',
'collation' => 'utf8mb4_unicode_ci',

to

'charset' => 'utf8',
'collation' => 'utf8_unicode_ci',