Magento 2.3.5-P2 error cannot use a scalar value as an array in SessionManager.php on line 492

The following error occurs while we using Redis for session storage Or file session storage :

Warning: Cannot use a scalar value as an array in /home/web/domains/web.com/public_html/vendor/magento/framework/Session/SessionManager.php on line 492

1	Warning: Cannot use a scalar value as an array in /home/web/domains/web.com/public_html/vendor/magento/framework/Session/SessionManager.php on line 492

– Please follow the below steps to resolve it :

Step 1: Please first override the following file: vendor/magento/framework/Session/SessionManager.php

Step 2: Open SessionManager.php and find following function ‘_getHosts()’ replace below line from this function :

return $_SESSION[self::HOST_KEY] ?? [];

1	return $_SESSION[self::HOST_KEY] ?? [];

replace it with:

return isset($_SESSION[self::HOST_KEY]) ? [$_SESSION[self::HOST_KEY]] : [];

1	return isset($_SESSION[self::HOST_KEY]) ? [$_SESSION[self::HOST_KEY]] : [];

That’s it! The error should be solved now.

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