Fatal error: Uncaught exception 'Zend_Loader_PluginLoader_Exception' with message 'Plugin by name 'Headlink' was not found in the registry

 If you get the following error or error similar to that, it causes the issue with the function name that you have used.
     
       Ex; $this->headlink('pathToFile'); It's not correct and shows the error.
       It must be $this->headLink('pathToFile'); ie 'L' must be capital letter.