Add error handline explanation.
Add error handline explanation.

durai145/github,cocktail-io/github,MalachiTatum/github,piotrmurach/github,peter-murach/github,wicky-info/github,samphilipd/github,firstval/github,befairyliu/github,joshsoftware/github,davengeo/github,GistBox/github,anabhilash619/github,yaoxiaoyong/github