jameshwart@linksync.com Posted October 14, 2016 Share Posted October 14, 2016 Hi i've got Invalid New Billing Cycle when trying to upgrade. May I know the usual cause of this error? WHMCS version 6.3.10 0 Quote Link to comment Share on other sites More sharing options...
jameshwart@linksync.com Posted October 14, 2016 Author Share Posted October 14, 2016 when I on debug. This is the error? How Can I overcome this? Notice: Undefined index: billingcycle in /opt/lampp/htdocs/whmcs_staging/upgrade.php on line 0 Invalid New Billing Cycle 0 Quote Link to comment Share on other sites More sharing options...
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