JError: Unable to load JDom class : JDomHtmlFormInputSelect Error ? How can I fix that?

I coppied files and folders in admin/dom/html/form/input and solved. But why this problem? I create 2 project. I saw same problem for both.. what ever..

Yes, it is a problem of requirements.
The combo select is requiring and maybe not recognized in the builder.

I should have a look on your project, but if you grow it up, it will instance it naturally because is very common.

Thanks 2 protect are same.One of them didn't work so I created a new one.
When you looking at my project please see an error.
Second project's second table. İt doesn't save data to author table.I didn't understand why.. Others save perfectly.Thanks for help.

For a long time i faced the same problem: JError: Unable to load JDom class : JDomHtmlLinkButton

What is strange, that i was installing the same project in Joomla many times and it was working, but now after removing it and installing again it doesn't work.

How can solve this problem?

Thank you in advance.

Fixed.
Try it again now.