It won't install.

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/vhosts/portallanguageservices.com/httpdocs/moodle/lib/environmentlib.php on line 406

Warning: Invalid argument supplied for foreach() in /var/www/vhosts/portallanguageservices.com/httpdocs/moodle/lib/environmentlib.php on line 147
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You must solve all the environmental problems (errors) found above before proceeding to install this Moodle version!

when I click on next again I get:

Warning: array_merge() [function.array-merge]: Argument #2 is not an array in /var/www/vhosts/portallanguageservices.com/httpdocs/moodle/lib/environmentlib.php on line 406

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Installation install.php

Checking your environment ...

We are checking if the various components of your system meet the system requirements

Warning: Invalid argument supplied for foreach() in /var/www/vhosts/portallanguageservices.com/httpdocs/moodle/lib/environmentlib.php on line 147
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subsequent nexts do nothing