ERR_HTTP_HEADERS_SENT

[xiopt]

Hello,
I am using your mvc solution and I get the [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client error sometimes.
Here is an example:

0|server  | Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
0|server  |     at ServerResponse.setHeader (_http_outgoing.js:470:11)
0|server  |     at ServerResponse.header (/var/www/scrapper-node/node_modules/express/lib/response.js:767:10)
0|server  |     at ServerResponse.send (/var/www/scrapper-node/node_modules/express/lib/response.js:170:12)
0|server  |     at done (/var/www/scrapper-node/node_modules/express/lib/response.js:1004:10)
0|server  |     at tryHandleCache (/var/www/scrapper-node/node_modules/ejs/lib/ejs.js:257:5)
0|server  |     at View.exports.renderFile [as engine] (/var/www/scrapper-node/node_modules/ejs/lib/ejs.js:482:10)
0|server  |     at View.render (/var/www/scrapper-node/node_modules/express/lib/view.js:135:8)
0|server  |     at tryRender (/var/www/scrapper-node/node_modules/express/lib/application.js:640:10)
0|server  |     at Function.render (/var/www/scrapper-node/node_modules/express/lib/application.js:592:3)
0|server  |     at ServerResponse.render (/var/www/scrapper-node/node_modules/express/lib/response.js:1008:7)
0|server  |     at ServerResponse.res.render (/var/www/scrapper-node/node_modules/express-flash/lib/express-flash.js:29:16)
0|server  |     at ServerResponse.res.render (/var/www/scrapper-node/app/kernel.js:129:20)
0|server  |     at index (/var/www/scrapper-node/app/controllers/VideoController.js:13:28)
0|server  |     at process._tickCallback (internal/process/next_tick.js:68:7)

VideoController.js looks like this:

module.exports = {
    /**
     * @param  {Object} req
     * @param  {Object} res
     * @param  {Function} next
     */
    index: async(req, res, next) => {
        const id = req.params.id
        if(typeof id === 'undefined') return res.notFound('Invalid video id')
        try {
            const cached = await CacheService.get(id)
            if (cached) {
                return res.render('video', JSON.parse(cached)) ### // Here is line 13
            }
            else {
                const video = await Video.findById(id)
                if (video === null) return res.notFound('Video not found')

                const links = VideoStreamService.create(req, res, id, video)

                if (links.status === 500) {
                    return res.notFound('No active sources found')
                }
                CacheService.set(id, JSON.stringify({
                    links: links.data
                }))
                return res.render('video', {
                    links: links.data
                })
            }
        }
        catch (err) {
            // next(err)
            return res.badRequest('Temporary error. Try again later or choose another mirror.')
        }

    },
}