Customize Settings No Longer Available

It seems that the GA code added with the Customizer is displaying incorrectly and causing a php error that may be blocking the Customizer from displaying all options, only Widgets is showing.
http://www.eventproductionservices.group/

The tag has been changed from this;
gtag('js', new Date()); gtag('config', '#######')
to this;
gtag('js', new Date()); gtag('config', '#########'

This is causing this error;
Uncaught SyntaxError: expected expression, got '&'

I have added the correct GA code with the theme editor but I can not remove the bad code the Customizer has added. Code I added is at line 9 of the html of the homepage. The bad code is at line 95 96 in Firefox source display of the page.

I do not have access to the database unless I add a plugin for that.

 

I have found another error on the Customizer settings in the admin, says the error is in wp-includes/js/jquery/ui/slider.min.js?ver=1.12.1 error at line:9:661

Code:

Uncaught TypeError: this._addClass is not a function
    jQuery 8
    _initControls http://www.eventproductionservices.group/wp-admin/js/iris.min.js?ver=1.0.7:5
    e.widget/</h[t]</< jQuery
    _create http://www.eventproductionservices.group/wp-admin/js/iris.min.js?ver=1.0.7:5
    jQuery 7
    _create http://www.eventproductionservices.group/wp-admin/js/color-picker.min.js?ver=5802dafb0b915a15b351118d54f79765:2
    jQuery 7
    ready http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:8
    initialize http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:8
    jQuery 2
    initialize http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:8
    Class http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:6
    i http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:6
    i http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:6
    <anonymous> http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:8
    each jQuery
    <anonymous> http://www.eventproductionservices.group/wp-admin/load-scripts.php?c=0&load[chunk_0]=wp-hooks,heartbeat,customize-base,customize-controls,customize-widgets,mce-view,imgareaselect&ver=5.6.2:8
    jQuery 13
slider.min.js:9:661

 

I found the issue with Customizer not displaying the settings, it was the "AppointUp" plugin version 1.0.5. It had also blocked UpDarft from fully loading, had to disable it to be able to use UpDraft. I disabled it and the settings in Customize were available again. Will there be an update to the AppointUp plugin to fix this?