I HAVE INSTALLED DOM, IMAP, XML AND RESTARTED THE APACHE SERVER BUT STILL GETTING THE SAME ERROR. PLEASE HELP!!
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Create an empty PHP file and put only <?php phpinfo(); in it, look at it in a browser.
Check if you can spot --disable-dom in the configuration options and/or if you can see details about the DOM extension in the list below.
If you cannot see DOM in the list or you see it is disabled, your PHP installation does not include the DOM extension. You'll need to recompile your PHP installation from source to remedy that.
Same error page is shown and there is no configuration page being displayed. This error is displayed in the development server while my local server is giving no error as such and working fine.