phpmyadmin blank page - getCookie error when 'php index.php' - php

Question

when accessing the www.hostname/phpmyadmin/ page i get the blank page. Tried to reinstall PHP,HTTPD and MYSQL.
After running php index.php in the phpmyadmin folder I get the following error:
[root#ansible1 phpmyadmin]# php index.php
PHP Fatal error: Uncaught Error: Call to a member function getCookie() on null in /usr/share/phpmyadmin/libraries/classes/Url.php:219
Stack trace:
#0 /usr/share/phpmyadmin/libraries/classes/Url.php(171): PhpMyAdmin\Url::getCommonRaw(Array, '?')
#1 /usr/share/phpmyadmin/libraries/classes/Core.php(762): PhpMyAdmin\Url::getCommon(Array)
#2 /usr/share/phpmyadmin/libraries/classes/Core.php(338): PhpMyAdmin\Core::linkURL('https://secure....')
#3 /usr/share/phpmyadmin/libraries/classes/Core.php(364): PhpMyAdmin\Core::getPHPDocLink('book.json.php')
#4 /usr/share/phpmyadmin/libraries/classes/Core.php(1006): PhpMyAdmin\Core::warnMissingExtension('json', true)
#5 /usr/share/phpmyadmin/libraries/common.inc.php(110): PhpMyAdmin\Core::checkExtensions()
#6 /usr/share/phpmyadmin/index.php(23): require_once('/usr/share/phpm...')
#7 {main}
thrown in /usr/share/phpmyadmin/libraries/classes/Url.php on line 219
On the line 219 in the corresponding file:
public static function getCommonRaw($params = [], $divider = '?')
{
/** #var Config $PMA_Config */
global $PMA_Config;
$separator = Url::getArgSeparator();
// avoid overwriting when creating navi panel links to servers
if (isset($GLOBALS['server'])
&& $GLOBALS['server'] != $GLOBALS['cfg']['ServerDefault']
&& ! isset($params['server'])
&& ! $PMA_Config->get('is_setup')
) {
$params['server'] = $GLOBALS['server'];
}
if (empty($PMA_Config->getCookie('pma_lang')) && ! empty($GLOBALS['lang'])) {
$params['lang'] = $GLOBALS['lang'];
}
$query = http_build_query($params, '', $separator);
if ($divider != '?' || strlen($query) > 0) {
return $divider . $query;
}
Not sure what I am doing wrong but havent found this error on the internet....
The blowfish secret is set:
$cfg['blowfish_secret'] = 'H2OxcGXxflSd8JwrwVlh6KW6s2rER63i';
Any idea what could I be missing? Even a hint what direction to look will be appreciated.
EDIT1:
Downgraded to version 4.9.4 - getting the similar error:
So after downgrading to version 4.9.4 I get the very similar....
[root#ansible1 phpmyadmin]# php index.php
PHP Fatal error: Uncaught Error: Call to a member function getCookie() on null in /usr/share/phpmyadmin/libraries/classes/Url.php:217
Stack trace:
#0 /usr/share/phpmyadmin/libraries/classes/Url.php(169): PhpMyAdmin\Url::getCommonRaw(Array, '?')
#1 /usr/share/phpmyadmin/libraries/classes/Core.php(749): PhpMyAdmin\Url::getCommon(Array)
#2 /usr/share/phpmyadmin/libraries/classes/Core.php(330): PhpMyAdmin\Core::linkURL('https://secure....')
#3 /usr/share/phpmyadmin/libraries/classes/Core.php(353): PhpMyAdmin\Core::getPHPDocLink('book.json.php')
#4 /usr/share/phpmyadmin/libraries/classes/Core.php(987): PhpMyAdmin\Core::warnMissingExtension('json', true)
#5 /usr/share/phpmyadmin/libraries/common.inc.php(106): PhpMyAdmin\Core::checkExtensions()
#6 /usr/share/phpmyadmin/index.php(27): require_once('/usr/share/phpm...')
#7 {main}
thrown in /usr/share/phpmyadmin/libraries/classes/Url.php on line 217
The page now shows: Access Denied - simply written, no pictures or anything.
What am I missing? :/
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Answer 1

I don't know if my previous post is visible, so I post it again:
I had the same error message, and row #4 says: "PhpMyAdmin\Core::warnMissingExtension('json', true)".
After installing php-json package, problem was solved for me.