Ok. To fix the template error, you are going to have to edit the plugin file I'm afraid. It's really easy. The code you need to find is at the very top of the file.
inc/plugins/cash_mod.php
Find
if($templatelist){ $templatelist .= ","; }
$templatelist .= "cm_main,cm_donate,cm_error,cm_donate_user,cm_donate_found,";
$templatelist .= "cm_donate_user_link,cm_donate_cash_user,cm_donate_confirm,";
$templatelist .= "cm_statement,cm_statement_donation,cm_statement_donation_row,";
$templatelist .= "cm_statement_interest,cm_statement_interest_row,";
$templatelist .= "cm_statement_ref,cm_statement_ref_link,cm_statement_page_link,";
$templatelist .= "cm_statement_page_bar";
Replace with
if(!defined('IN_ADMINCP') || !IN_ADMINCP){
if($templatelist){ $templatelist .= ","; }
$templatelist .= "cm_main,cm_donate,cm_error,cm_donate_user,cm_donate_found,";
$templatelist .= "cm_donate_user_link,cm_donate_cash_user,cm_donate_confirm,";
$templatelist .= "cm_statement,cm_statement_donation,cm_statement_donation_row,";
$templatelist .= "cm_statement_interest,cm_statement_interest_row,";
$templatelist .= "cm_statement_ref,cm_statement_ref_link,cm_statement_page_link,";
$templatelist .= "cm_statement_page_bar";
}
EDIT: If you don't feel like editing the file, you can redownload the cash mod from mybb mods and upload it over the original plugins/cash_mod.php file.
For the people who can't get the donate link working, I am going to need you to send me your cash_mod.php in your forum root directory
NOT the plugin file. When the plugin was activated a new file called cash_mod.php was created in the root forum directory.