Crash at homebridge start: Cannot read property 'getCharacteristic' of undefined
Hi there, running latest home bridge version and just updated to the just published update (Version 0.14.0-beta.5). 

I had configured 5 Shelly 2.5 working fine as roller shutters until now, still with firmware 1.7. I am getting the following error after restart not allowing even to start homebridge:

Aug 14 16:26:07 raspberrypi homebridge[968]: [2020-8-14 16:26:07] TypeError: Cannot read property 'getCharacteristic' of undefined
Aug 14 16:26:07 raspberrypi homebridge[968]:     at SwitchAbility.get characteristic [as characteristic] (/usr/local/lib/node_modules/homebridge-shelly/abilities/base.js:340:27)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at SwitchAbility._setupEventHandlers (/usr/local/lib/node_modules/homebridge-shelly/abilities/base.js:385:14)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at SwitchAbility.setup (/usr/local/lib/node_modules/homebridge-shelly/abilities/base.js:29:12)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at ShellyRelaySwitchAccessory.setup (/usr/local/lib/node_modules/homebridge-shelly/accessories/base.js:74:11)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at Object.createAccessory (/usr/local/lib/node_modules/homebridge-shelly/accessories/factory.js:659:17)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at ShellyPlatform.createAccessoryFromContext (/usr/local/lib/node_modules/homebridge-shelly/platform.js:235:42)
Aug 14 16:26:07 raspberrypi homebridge[968]:     at ShellyPlatform.configureAccessory (/usr/local/lib/node_modules/homebridge-shelly/platform.js:201:12)
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