lib is undefined, followed by images is undefined...

I have no Flash/Animate/Adobe experience.  I was just an end user (Reader and Flash swfs). So when the person at my work that does all this type stuff left, I was glad that I wasn't in their department because I didn't want to learn any of it. (Famous Last Words).  Somehow it dropped in my lap.  I assumed they were using the latest version of  Animate but I must be wrong, because I can't get it to publish correctly.  I am  using Animate 2021 and am getting the "lib is undefined" error.  All of my searches say to reverence the lib in the frame code.  so I added  

document.lib = lib;

to all the frames. I modified my 3rd party script to use document.lib and I got a different error, Unable to read property 'properties' of undefined.  I opened the published js file and changed

(function (cjs, an) {

var p; // shortcut to reference prototypes
var lib={};var ss={};var img={};

to 

lib={};
(function (cjs, an) {

var p; // shortcut to reference prototypes
//var lib={};
var ss={};var img={};

 When I ran the animation this time, the lib and properties errors were gone and it was replaced by 'images' is undefined.  I did the same thing with images that I did with lib and got another error"Object doesn't support property or method '_renderFirstFrame'"

What am I missing??? OR is there a way to install the older version of Animate where this wasn't a issue.  2015 I believe LOL.