Layout has errors as:
TypeError: head.add is not a function
    at /home/gocharm/bin/wnode/lib/base/Render.js:235:18
    at tryCatcher (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/util.js:16:23)
    at Promise._settlePromiseFromHandler (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:547:31)
    at Promise._settlePromise (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:729:18)
    at Promise._fulfill (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:673:18)
    at Promise._resolveCallback (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:466:57)
    at Promise._settlePromiseFromHandler (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:559:17)
    at Promise._settlePromise (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:604:18)
    at Promise._settlePromise0 (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:649:10)
    at Promise._settlePromises (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:729:18)
    at Promise._fulfill (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:673:18)
    at PromiseArray._resolve (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise_array.js:127:19)
    at PromiseArray._promiseFulfilled (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise_array.js:145:14)
    at Promise._settlePromise (/home/gocharm/bin/wnode/node_modules/bluebird/js/release/promise.js:609:26)