This sounds like a server side issue more than an issue with the code. With that said, I'd suggest renaming the folders using a FTP client, or if available, your hosting provider's file manager.

If you have issues with the Joomla CMS code base, please report them to https://github.com/joomla/joomla-cms/issues/new

I guess I'm confused why Joomla doesn't make a work around for this. There used to be a lot more options available in the directories/folders in the older version. I don't see where I can copy or move any of the folders or files.

The only files you can move in the CMS user interface are in the Media Manager or any third party file management extensions you may have installed. As I stated before, you'll need access to an external file management tool to rename any folders you're having difficulties accessing.

The CMS code base may have some places where spaces are handled in file or folder names, but the CMS cannot guarantee that third party tools will work with this as well. I'm going to assume you're working with some sort of form management extension based on the folder name you've listed; the CMS does not ship a form management extension.

Again, your issue seems to be less likely a code base issue but more of a server issue. Many browsers also handle spaces just fine by encoding them as %20.

The browser handles it just fine by putting in %20. But I can't access the folder through the Joomla Media Manager. I click on the folder to view its contents (which contains a few pdfs), and it wont open. I tried creating a new folder with a space and it wont accept that name saying it can't contain spaces. I used NinjaExplorer in our older version. I just realized that it's not there for our new version.