Ssi file error [an error occurred while processing this directive]
https://www.cnblogs.com/andyhxl/p/8485310.html (attention to the problem of path, for example, I use # include virtual = “ssi/XXX. Ssi” was written in I # include virtual = “./ssi/head – top ssi “has been submitted to the the fault, check the heart tired only to find that is the result of the path!!!)