CRM Won't Import Successfully

Trying to import customers into the CRM Module keeps kicking back an error:500 on the page. After going back into the module afterwards of the over 100+ customers that we were trying to import only 38 came through and they didn’t come through with all their information intact. We imported using the sample spreadsheet provided within the module. The HR Import function works without issues. This began with the last update to the plugin that came through in April. Any assistance on this would be greatly appreciated, I’m not even sure where to begin to look within the code itself. Thanks.