Read the statement by Michael Teeuw here.
MMM-Voice-Control - only black screen after installation.
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 No changes… npm start dev 
 magicmirror@2.1.0 start /home/pi/MagicMirror
 electron js/electron.js “dev”
 Starting MagicMirror: v2.1.0
 Loading config …
 Loading module helpers …
 No helper found for module: MMM-Voice-Control.
 No helper found for module: alert.
 Initializing new module helper …
 No helper found for module: clock.
 Initializing new module helper …
 No helper found for module: currentweather.
 No helper found for module: weatherforecast.
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 Initializing new module helper …
 All module helpers loaded.
 Starting server op port 8080 …
 Server started …
 Connecting socket for: updatenotification
 Connecting socket for: calendar
 Starting node helper for: calendar
 Connecting socket for: MMM-DWD-WarnWeather
 MMM-DWD-WarnWeather helper started…
 Connecting socket for: MMM-SystemStats
 Connecting socket for: newsfeed
 Starting module: newsfeed
 Connecting socket for: MMM-WatchDog
 Staring module helper: MMM-WatchDog
 Connecting socket for: MMM-FRITZ-Box-Callmonitor
 Starting module: MMM-FRITZ-Box-Callmonitor
 Connecting socket for: MMM-Remote-Control
 Starting node helper for: MMM-Remote-Control
 Connecting socket for: MMM-Admin-Interface
 Starting node helper for: MMM-Admin-Interface
 Connecting socket for: MMM-Fuel
 Starting module: MMM-Fuel
 Sockets connected & modules started …
 Launching application.
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 @Q14siX you are posting the terminal log but when you start with npm start dev you have a window on the side which has also a console log 
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 Initializing MagicMirror. 
 translator.js:182 Loading core translation file: translations/de.json
 translator.js:204 Loading core translation fallback file: translations/en.json
 loader.js:182 Load script: modules/MMM-Voice-Control//MMM-Voice-Control.js
 module.js:415 Module registered: MMM-Voice-Control
 loader.js:152 Bootstrapping module: MMM-Voice-Control
 loader.js:182 Load script: modules/MMM-Voice-Control//node_modules/annyang/annyang.js
 annyang.js Failed to load resource: the server responded with a status of 404 (Not Found)
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 @Q14siX did you run npm installin the module directory?
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 Yes, already several times. But: npm install 
 npm WARN enoent ENOENT: no such file or directory, open ‘/home/pi/MagicMirror/modules/package.json’
 npm WARN enoent ENOENT: no such file or directory, open ‘/home/pi/MagicMirror/modules/node_modules/node_helper/package.json’
 npm WARN modules No description
 npm WARN modules No repository field.
 npm WARN modules No README data
 npm WARN modules No license field.And: ~/MagicMirror/modules/MMM-Voice-Control $ npm install 
 Magic-Mirror-Module-Voice-Control@1.0.0 /home/pi/MagicMirror/modules/MMM-Voice-Control
 └── annyang@2.6.0
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 @Q14siX the second should fix your issue 
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 In the module is an error. 
 The annyang.js file must be manually copied from the directory “dist” to the directory of the module.

