There are two reasons cause this error now,:
1, as the below advertising template directory structure, advertising page is pop.html
[E:\bandwidth prepay prompting windows]
Pack as zip, if zip the " bandwidth prepay prompting windows " directory, and preview after upload, will appear HTTP 500 error;
2, if the pop.html page:
The mark charset parameters is utf-8, as the below shows:
But the page file format is not utf-8, such as file format is unicode, then preview after upload, will appear HTTP 500 error.