You need to put code in your config-> my.ini file in case you use xampp server.

If you use Apache server than open my.cnf  file

copy below code and paste it.

[client]
default-character-set = utf8mb4

[mysqld]
innodb_file_format = Barracuda
innodb_file_per_table = 1
innodb_large_prefix

character-set-server = utf8mb4
collation-server = utf8mb4_unicode_ci
skip-character-set-client-handshake

[mysql]
default-character-set = utf8mb4

• Restart your MySQL server.