OROCRM“加载模板时出错。”

We are using OROCRM with Apache2 on our server. I can create new email template successfully. But when I try use it in Lead > More Actions > Send Email section, it alerts me "Error occured while loading template."

I have looked the error.log file. Nothing logged. I give 777 to all path. No problem about permissions. How can I watch the problem? Is there a any OROCRM error log file etc?

Check app/log/prod.log if you run in prod mode.