Compiler causing errors

I'm trying to get faster page loads and implemented the script compiler (Standard). I am getting two separate errors:

Uncaught TypeError: Cannot read property 'addEventListener' of null
at 5a2777b.js:45
at 5a2777b.js:45

and

    Uncaught TypeError: jQuery(...).mask is not a function
    at HTMLDocument.<anonymous> ((index):1548)
    at HTMLDocument.dispatch (5a2777b.js:3)
    at HTMLDocument.r.handle (5a2777b.js:3)
    at Object.trigger (5a2777b.js:3)
    at Object.a.event.trigger (5a2777b.js:9)
    at HTMLDocument.<anonymous> (5a2777b.js:3)
    at Function.each (5a2777b.js:2)
    at a.fn.init.each (5a2777b.js:2)
    at a.fn.init.trigger (5a2777b.js:3)
    at HTMLDocument.<anonymous> ((index):1548)

My site is https://ejusa.org

I've de-activated the compiler for now but would love help figuring out these errors.