Welcome the Technical Support section. Help us in assisting you by providing us with a concise and descriptive elaboration of your issues. Be specific and if possible, provide us with a step-by-step instruction in replicating your problem.
the issue with joomla it self, missing default frontend template.
to tackle this issue I select Salient - Default as default template. please make correction/select other one if I wrong.
you can do it from joomla template manager