Payment Plugin - Fatal error on clean install

[slinkyaroo]

Layout
osclass 3.3.2 (stock)
stock bender theme
Payments v2.0.0
Plugin aquired from OSClass market. Tried system and manual installations.
No mods, editing or plugins added.

I did a fresh osclass install of osclass 3.3.2 then added Payments v2.0.0. Everything is stock,no other plugins. When installing Payment plugin I get

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Plugin couldn't be installed because it triggered a fatal error
I have tried it on my regular site and couldn't get the plugin working so I did a fresh new site. It does install the data tables.  I have deleted the tables and plugin and tried repeatedly to install it.  Same error occurs.

Any ideas?  Compatibility issue with  new version maybe?  Am I missing a php or sql function?

[slinkyaroo]

Here's my error log

[04-Aug-2014 22:10:54 Europe/Madrid] PHP Fatal error:  Call to undefined function mcrypt_encrypt() in /home/swapbarrel/public_html/try/oc-content/plugins/payment/functions.php on line 18

line 18

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18.         return base64_encode(mcrypt_encrypt($cypher, PAYMENT_CRYPT_KEY, $string, $mode,

Need help please.  It's not a theme issue.

[teseo]

Hi,

Talk to your hosting, Mcrypt is a PHP extension and maybe they haven't installed it along with PHP main program... 

http://php.net/manual/en/mcrypt.installation.php

Regards

[slinkyaroo]

I had to google Mcrypt to find out what it was.  Adding the php extension now to see if the plugin works.

and it now installs fine.  Just a fyi for the next guy.

Resolved