Syntax Error: Unexpected character '`'

[rakesh1988]

I am a complete newbie to jade/pug... Trying to add bootstrap to pug i copied pug-bootstrap folder inside my views folder changed my index.pug as follows

extends ./pug-bootstrap/_bootstrap
block body
    h1 Put your own body content here

I am getting this error when i load my index page

D:\Workspace\NodeJs\for_delete\views\pug-bootstrap\components\tabs.pug:11:13 9| if (index === active) 10| li.active > 11| a(href=`#tab${item}`,role="tab",data-toggle="tab")= item --------------------^ 12| else 13| li 14| a(href=`#tab${item}`,role="tab",data-toggle="tab")= item Syntax Error: Unexpected character '`'

Error: D:\Workspace\NodeJs\for_delete\views\pug-bootstrap\components\tabs.pug:11:13
    9| 			if (index === active)
    10| 				li.active
  > 11| 					a(href=`#tab${item}`,role="tab",data-toggle="tab")= item
--------------------^
    12| 			else
    13| 				li
    14| 					a(href=`#tab${item}`,role="tab",data-toggle="tab")= item

Syntax Error: Unexpected character '`'
    at makeError (D:\Workspace\NodeJs\for_delete\node_modules\pug-error\index.js:32:13)
    at Lexer.error (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:58:15)
    at Lexer.assertExpression (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:86:12)
    at Lexer.attrs (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:1089:18)
    at Lexer.callLexerFunction (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:1319:23)
    at Lexer.advance (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:1356:15)
    at Lexer.callLexerFunction (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:1319:23)
    at Lexer.getTokens (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:1375:12)
    at lex (D:\Workspace\NodeJs\for_delete\node_modules\pug-lexer\index.js:12:42)
    at Object.lex (D:\Workspace\NodeJs\for_delete\node_modules\pug\lib\index.js:99:27)

is it because you are using "pug": "^2.0.0-beta3" and i am using "pug": "^2.0.0-rc.3",

[rakesh1988]

looks like the answer is "yes" i tried to change the my package's pug version to beta-3 and it worked.