I do not get any click options

https://web-hoff.com/wp_work/mdocuments-library/

You theme you are using is loading a bootstrap.js file this is conflicting with the mDocs bootstrap file.

mDocs is using WordPress best practise when adding scripts so to correct your issue please update your theme with this:

$handle = 'bootstrap.min.js';
$list = 'enqueued';
if (wp_script_is( $handle, $list )) { return; }
else {
    wp_register_style( 'bootstrap-style', '//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css');
    wp_enqueue_style( 'bootstrap-style' );
    wp_register_script( 'bootstrap.min.js', '//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js');
    wp_enqueue_script( 'bootstrap.min.js' );
}

Thank you – which file do I modify?

this would usually go into the themes functions.php file.

Awesome – thanks! Working now.

download works. Description and preview not working

it didn’t work you still have 2 bootstrap.js files loaded. You need to find where your theme is loading it and remove it.

OK, just I am clear. I find the pages and ad that code you posted?

for now remove the code i provided, seem to break thing more. And find where your theme is loading the bootstrap.js file and remove it.

getting closer. the preview opens, but hangs

also remove the bootstrap.css file as well.

no effect

I tried different themes, none of them worked. Do you have themes this works for out of the box?

I have my workaround. I have reassessed my needs for preview and I have removed that : -0 I’m happy now. Thank you very much for all your assistance

no problem,

to answer your above question, if changing the theme doesn’t work it maybe a plugin.

Just a thought.