isotope_design

Looking for someone to hopefully help me out. I have been using WHMCS for a couple of years and never had any issue - I have however just been alerted to the fact that automatic invoice creation and payment capture stopped a couple of months ago and I have very little idea how to troubleshoot. I have very little time to try and figure this issue out so would be happy to pay my way through the problem just to ensure it is resolved. HELP!!!