while i am running npm run dev

ERROR in ./node_modules/bootstrap-loader/lib/bootstrap.scripts.loader.js?{"bootstrapVersion":3,"useCustomIconFontPath":false,"extractStyles":false,"styleLoaders":["style","css","sass"],"styles":["mixins","normalize","print","glyphicons","scaffolding","type","code","grid","tables","forms","buttons","component-animations","dropdowns","button-groups","input-groups","navs","navbar","breadcrumbs","pagination","pager","labels","badges","jumbotron","thumbnails","alerts","progress-bars","media","list-group","panels","wells","responsive-embed","close","modals","tooltip","popovers","carousel","utilities","responsive-utilities"],"scripts":["transition","alert","button","carousel","collapse","dropdown","modal","tooltip","popover","scrollspy","tab","affix"],"configFilePath":"/home/suyash644/Documents/ethexch/ethexchange/exch/node_modules/bootstrap-loader/.bootstraprc-3-default","bootstrapPath":"/home/suyash644/Documents/ethexch/ethexchange/exch/node_modules/bootstrap-sass","bootstrapRelPath":"../bootstrap-sass"}!./node_modules/bootstrap-loader/no-op.js
Module not found: Error: Can't resolve 'imports-loader' in '/home/suyash644/Documents/ethexch/ethexchange/exch'
@ ./node_modules/bootstrap-loader/lib/bootstrap.scripts.loader.js?{"bootstrapVersion":3,"useCustomIconFontPath":false,"extractStyles":false,"styleLoaders":["style","css","sass"],"styles":["mixins","normalize","print","glyphicons","scaffolding","type","code","grid","tables","forms","buttons","component-animations","dropdowns","button-groups","input-groups","navs","navbar","breadcrumbs","pagination","pager","labels","badges","jumbotron","thumbnails","alerts","progress-bars","media","list-group","panels","wells","responsive-embed","close","modals","tooltip","popovers","carousel","utilities","responsive-utilities"],"scripts":["transition","alert","button","carousel","collapse","dropdown","modal","tooltip","popover","scrollspy","tab","affix"],"configFilePath":"/home/suyash644/Documents/ethexch/ethexchange/exch/node_modules/bootstrap-loader/.bootstraprc-3-default","bootstrapPath":"/home/suyash644/Documents/ethexch/ethexchange/exch/node_modules/bootstrap-sass","bootstrapRelPath":"../bootstrap-sass"}!./node_modules/bootstrap-loader/no-op.js 12:0-64
@ ./node_modules/bootstrap-loader/lib/bootstrap.loader.js!./node_modules/bootstrap-loader/no-op.js
@ ./node_modules/bootstrap-loader/loader.js
@ ./app/javascripts/app.js
@ multi (webpack)-dev-server/client?http://localhost:8081 ./app/javascripts/app.js
webpack: Failed to compile.
^C

    //////////////////////////////////
    // DEPOSIT AND WITHDRAWAL TOKEN //
    //////////////////////////////////
    function depositToken(string symbolName, uint amount)  {
        uint8 symbolNameIndex = getSymbolIndexOrThrow(symbolName);
        require(tokens[symbolNameIndex].tokenContract != address(0));

        ERC20Interface token = ERC20Interface(tokens[symbolNameIndex].tokenContract);

        require(token.transferFrom(msg.sender, address(this), amount) == true);
        require(tokenBalanceForAddress[msg.sender][symbolNameIndex] + amount >= tokenBalanceForAddress[msg.sender][symbolNameIndex]);
        tokenBalanceForAddress[msg.sender][symbolNameIndex] += amount;
        DepositForTokenReceived(msg.sender, symbolNameIndex, amount, now);
    }

I see the following error on Remix
transact to Exchange.depositToken errored: VM error: revert.
revert The transaction has been reverted to the initial state.
Note: The constructor should be payable if you send value. Debug the transaction to get more information.