[Bug] Settings Page Unresponsive in Homebridge
Please use the template and fill in all the data requested below!

**Describe the bug**
- I have installed the z2m plugin 3 times already to see if the issue goes away, but it doesn't. Once the plugin installed, I click on SETTINGS for this plugin and I get "Page Unresponsive" after about 5-10 seconds trying to click and update the values such as Server, etc. The only options given are "Exit Page" or "Wait". Clicking EXIT, crashes the page. Clicking WAIT, does nothing.

**Related devices**
Are you experiencing this behavior with a particular device? Yes
Please list which device(s) you experience this with.
- In Homebridge VM hosted on Proxmox

**To Reproduce**
Steps to reproduce the behavior, for example:
1. Install Zigbee2mqtt from homebridge UI
2. Go to Plugins page and click on settings for z2m
3. click around on the screen for few seconds

**Expected behavior**
- It should allow me to update the server in the settings page and save it, however, it hangs and rashes.

**MQTT messages**
If possible (and applicable), please provide the following:
- Nothing shows up in the messages

**Versions used**
Please provide the version of the following pieces of software:
 - homebridge-z2m v1.6.0
 - Homebridge v1.3.4
 - Zigbee2MQTT 1.21.1-1

**Screenshot**
![Screen Shot 2021-09-30 at 3 49 04 PM](https://user-images.githubusercontent.com/875782/135523009-759bb578-f104-413c-a1f3-0fd6d7c6cdf0.png)

