Read the statement by Michael Teeuw here.
MMM-Voice-Control - only black screen after installation.
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 @Q14siX can you start the mirror with npm start devand check if you can spot an error in the console there? the log you posted looks fine cant see an issue here
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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.

