Read the statement by Michael Teeuw here.
MMM-Hover node-modul error
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 I had a similar problem once with anoter module, this helped #Change into the modules directory cd modules/MMM-Hover # Rebuild module for the correct elecron version npm rebuild --runtime=electron --target=$(../../node_modules/electron/cli.js --version) --disturl=https://atom.io/download/atom-shell --build-from-sourceAxLED 
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 @Skorpionbird 
 I am not sure if the code mentioned above works, i just saw you have an node problem, my problem was a electron problem.
 AxLED
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 Please use the Markdown features of the board to assist others in reading your code and log files. On another note, when the error message says: Error: The module '/home/pi/MagicMirror/modules/MMM-Hover/node_modules/epoll/build/Release/epoll.node’ 
 was compiled against a different Node.js version using
 NODE_MODULE_VERSION 59. This version of Node.js requires
 NODE_MODULE_VERSION 57. Please try re-compiling or re-installing
 the module (for instance, using npm rebuild or npm install).Did you try those commands? cd /home/pi/MagicMirror/modules/MMM-Hover npm rebuild
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 dosn`t work with npm rebuild 
 any ideas
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 Rebuild the electron 
 cd MagicMirror/modules/MMM-Hover
 npm install --save-dev electron-rebuild
 ./node_modules/.bin/electron-rebuild

