BaseClass.java file showing error for ExtentTestManager class

[SeleniumMani]

Hello Sachin,
I have downloaded your API project and done some changes according to my needs and its started working. But all of sudden, it's start throwing error in listener BaseClass. Could you please look at once?
I tried to download again from GIT and loaded to Eclipse but this time error is throwing @ same BaseClass file.

[sacgupta-conga]

Hello Mani, make sure you have added testng library in your project, if you have not added then you will get that error.

Is that error related to testng??

Thanks,
Sachin