Laravel frequently showing 'Undefined variable: _SERVER' - php

Question

I am frequently getting the following error in Laravel 5.4.
Notice: Undefined variable: _SERVER in
C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php on
line 305
Notice: Undefined variable: _GET in C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php on
line 315
Fatal error: Uncaught TypeError: Argument 1 passed to Symfony\Component\HttpFoundation\Request::createRequestFromFactory()
must be of the type array, null given, called in
C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php on
line 315 and defined in
C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php:2014
Stack trace: #0
C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php(315):
Symfony\Component\HttpFoundation\Request::createRequestFromFactory(NULL,
Array, Array, Array, Array, NULL) #1
C:\wamp64\www\hxponline\vendor\laravel\framework\src\Illuminate\Http\Request.php(59):
Symfony\Component\HttpFoundation\Request::createFromGlobals() #2
C:\wamp64\www\hxponline\public\index.php(53):
Illuminate\Http\Request::capture() #3 {main} thrown in
C:\wamp64\www\hxponline\vendor\symfony\http-foundation\Request.php on
line 2014
Also in the phpmyadmin page I am getting,
Fatal error: Uncaught Error: Call to a member function setCookie() on
null in C:\wamp64\apps\phpmyadmin4.7.4\libraries\ThemeManager.php:260
Stack trace: #0
C:\wamp64\apps\phpmyadmin4.7.4\libraries\common.inc.php(616):
PMA\libraries\ThemeManager->setThemeCookie() #1
C:\wamp64\apps\phpmyadmin4.7.4\sql.php(18):
require_once('C:\wamp64\apps\...') #2 {main} thrown in
C:\wamp64\apps\phpmyadmin4.7.4\libraries\ThemeManager.php on line 260
I couldn't figure out any reason what is the reason for all these errors.
Any help would be really appreciated.