fresh install errors

Trying to test udraw to see if it will work for us before going fully all in. created template. tied it to a product. had a test user design and checkout with that product. then these 4 things happen. 1) in the admin side where the order is, there are 3 buttons. view pages, something else, and download pdf. that second button doesn’t show text, it just has an animated spinning gif spinning forever. when i click on it the page scrolls to the bottom which then turns into problem #2. 2) that area that says udraw product viewer doesn’t work. it’s broken. it shows the gui of the design tool but no design or anything inside. 3) third problem is when downloading the pdf, it is blank. all white with no background or foreground elements. only one element out of all the elements shows but since it’s white with a bit of drop shadow it barely shows up because it’s supposed to be on top of a dark color and the dark background element isn’t there. so basically an unusable pdf. 4) and the fourth thing is in the front side of the site where the customer logs in then views his/her orders, they can preview the order and there is a thumbnail of the purchased design, but above that thumbnail it has this error: Warning: count(): Parameter must be an array or an object that implements Countable in /home/betastore/public_html/wp-content/plugins/udraw/uDraw.php on line 2368. not sure what’s supposed to be there, but if that error is fixed, hopefully it shows pdf download link for customer to be able to download the pdf as well. that’s all the errors for now. this is new wordpress install latest version as of today (ver 5.4.2 on 7-31-2020). new woocommerce install latest version (ver 4.3.1). not sure if it’s latest udraw. got it from your site just yesterday (ver 3.1.1). php version on the site started on 7.2 then i tried 7.0 then 5.6 and now it’s on 7.4. it doesn’t work on any of those php versions. would you be able to tell me all the server dependancies this plugin needs? what all apache and php modules/extensions are needed? here are javascript errors on the admin order page by the way: Uncaught TypeError: $(…).sortable(…).selectable is not a function – from Designer.min.js in a udraw directory. Uncaught TypeError: RacadDesigner.Legacy is undefined – coming from post.php in admin folder (not a udraw folder) but who knows maybe the admin one is triggered by the udraw one.