You're probably doing nothing wrong at all... Sometimes modules have minor issues that need to be addressed.  :)

First, I'd suggest upgrading to the latest release of DNN 9.3.xx as soon as you can.  I haven't reviewed the release notes lately to confirm if it might be contributing to the issue you're experiencing, but 9.3.0 should be moved away from as soon as you can.  I recall there being at least one show-stopping issue in that release.

https://github.com/dnnsof...form/releases/latest

Next, when you're trying to add the module to the page, are you doing it as a superuser or an administrator/authorized user?  It also may matter if there is more than one website on this instance of DNN.

If it's the latter, then you'll need to "edit" the module in the Extensions view where you installed it.  While there, you'll be able to assign Deploy permissions to the website/security roles.

I am currently on DNN 9.3.2 (24) and logged in as host when attempting to load module. 

I only have the one website.

In that case, there's something else wrong...

Have you found any related errors in the Admin Log? What about the web developer console in the web browser? Does that have any related errors?

Also, does this happen on all pages, or only specific pages? You may want to try creating a new page that is using the out-of-the-box theme and container to see if this still happens there.

I have finally figured out why the modules that I added to installed modules do not display in the add module window it is because the add module only displays ten modules.

Only the first ten modules in the installed module list show in the add module window. If I add a module like digflash the last module which showed before drops off. If I delete the digflash module the last module will reappear.
So for some reason the add module window will only display ten extensions.
Now I know what the problem is but have no idea how to fix it.
What controls the add module window?

Posted By Rob Greinke on 24 Jun 2019 09:01 PM
I have finally figured out why the modules that I added to installed modules do not display in the add module window it is because the add module only displays ten modules.

Only the first ten modules in the installed module list show in the add module window. If I add a module like digflash the last module which showed before drops off. If I delete the digflash module the last module will reappear.
So for some reason the add module window will only display ten extensions.
Now I know what the problem is but have no idea how to fix it.
What controls the add module window?

Oh... It sounds like you might be experiencing default/built-in behavior.  Have you tried scrolling down in the add module window/pop-up?  What should happen when you do, is that another batch of modules will automatically load below the first ones. 

You can also use the search dialog to just load what you want, if you know what it's named.  On some websites (e.g., a low-resource staging server or  a website with a lot of extensions installed), it could take longer than desired for the additional modules to load.

For modules that you plan to use often, you can bookmark them.  You should see a bookmark icon over it when you hover the mouse over it.  If you do tbookmark the module, it will load as one of the first ones from that point forward.

I had tried to scroll down in the window before but there are no more that the ten modules listed.
If I hover over a module extension in the installed extension list I get nothing for bookmarking it.

The search option in the add module does bring up the requested module. Thanks for that at least now I can start adding modules to some
of the pages but once I add it to the page it doesn't appear again. It reverts back to the original ten modules.
But thanks for the heads up on the search option that helps a lot.

Interesting... When I try on a clean instance, it seems to work as expected. :( 

https://www.screencast.com/t/BdnNLeTbL0

Do you know if the website reports any errors in the web developer tools console?  Perhaps there's a conflict with modules on the page or the theme that is causing this?

Rob,

just start typing the name of the module in the search box to filter - or scroll down (using the scroll bar on the right, or the mousewheel), then the next 10 modules come into view...

Happy DNNing
Michael

The scroll bar only goes down to the last (tenth) module and the mouse wheel only goes to the same position. The only thing that works is the search option which will bring up undisplayed modules.
Could this be a problem with the skin?