phpMyAdmin error: I am seeing errors in user accounts

This is my first xampp installation. In phpMyAdmin I am seeing following screen:

ave replication state from table mysql.gtid_slave_pos: 1146:

@Z() mysqld.exe!?do_command@@YA_NPAVTHD@@@Z() mysqld.exe!?

TIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYS

see``, Routine_name, Routine_type) VALUES("ma_test_host"

umm last_update in table "mysql"."innodb_table_stats" is BIN

x_threads=501 thread_count=2 It is possible that mysql co

exe!my_security_attr_free() mysql.exe!simple_key_cache_rea

abort. Query (0x106e2f50): FLUSH PRIVILEGES Connection ID

'ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CR

iv(host,Db,User,Routine_name,Routine_type`) VA

,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_c

RROR] Missing system table mysql.roles_mapping; please run m

b50 InnoDB: Error: Column last_update in table "mysql"."inno

localhost

or misconfigured. This error can also be caused by malfunc
127.0.0.1 DB: Error: Column last_update in table "mysql"."innodb_table e '.\mysql\procs_priv.MYI'; try to repair it 151101 21:18:0
md_resignal@@UBE?AW4enum_sql_command@@XZ() mysqld.exe!?ha_i

I googled and found this link but when am going to mysql website then there I am seeing 5.7x version

UPDATE:
I installed Xampp and I can see localhost. The Xampp starts apache + MySQL with no errors but when I click ==>phpMyAdmin ==> User Accounts then I was seeing aforementioned error.

Today when I restarted my laptop and again gone to phpMyAdmin==> user accounts then I am seeing SQL error:

(SELECT DISTINCT `User`, `Host` FROM `mysql`.`user`) UNION (SELECT DISTINCT `User`, `Host` FROM `mysql`.`db`) UNION (SELECT DISTINCT `User`, `Host` FROM `mysql`.`tables_priv`) UNION (SELECT DISTINCT `User`, `Host` FROM `mysql`.`columns_priv`) UNION (SELECT DISTINCT `User`, `Host` FROM `mysql`.`procs_priv`) ORDER BY `User` ASC, `Host` ASCrr

Error
Static analysis:

5 errors were found during analysis.

Unexpected closing bracket. (near ")" at position 51)
Unexpected closing bracket. (near ")" at position 108)
Unexpected closing bracket. (near ")" at position 174)
Unexpected closing bracket. (near ")" at position 241)
Unexpected closing bracket. (near ")" at position 306)
SQL query: Documentation

(SELECT DISTINCT `User`, `Host` FROM `mysql`.`user`) UNION (SELECT DISTINCT `User`, `Host` FROM `mysql`.`db`) UNION (SELECT DISTINCT

User, Host FROM mysql.tables_priv) UNION (SELECT DISTINCT
User, Host FROM mysql.columns_priv) UNION (SELECT DISTINCT
User, Host FROM mysql.procs_priv) ORDER BY User ASC, Host
ASC LIMIT 0, 25

MySQL said: Documentation

#126 - Incorrect key file for table '.\mysql\user.MYI'; try to repair it

UPDATE-1:
I again restarted and seeing the following:

Warning in .\libraries\dbi\DBIMysqli.class.php#261 mysqli_query():
(HY000/1030): Got error 9 "Bad file descriptor" from storage
engine MyISAM

Backtrace

.\libraries\dbi\DBIMysqli.class.php#261: mysqli_query( object, string
'SELECT * FROM mysql.db LIMIT 1', integer 0, )
.\libraries\DatabaseInterface.class.php#246:
PMA_DBI_Mysqli->realQuery( string 'SELECT * FROM mysql.db LIMIT
1', object, integer 0, ) .\libraries\check_user_privileges.lib.php#46:
PMA_DatabaseInterface->tryQuery(string 'SELECT * FROM mysql.db
LIMIT 1') .\libraries\check_user_privileges.lib.php#395:
PMA_checkRequiredPrivilgesForAdjust()
.\libraries\List_Database.class.php#17:
require_once(.\libraries\check_user_privileges.lib.php)
.\libraries\PMA.php#17:
require_once(.\libraries\List_Database.class.php)
.\libraries\common.inc.php#1089: include_once(.\libraries\PMA.php)
.\server_privileges.php#12: require_once(.\libraries\common.inc.php)
Please advise

Thanks in anticipation