SmartyException in smarty_internal_template.php line 678: Missing template name

[ChariotsOfThyer]

So I uploaded PTS Diana free theme onto my website to have a play and see what I thought. After many attempts trying to mould it and get it to look nice I found it to be extremely buggy and unreliable. I then attempted to load a different theme but got the above message, reverted back to diana and the site was fine again. I then wanted to switch to classic as I thought it was the theme I just uploaded that was the issue. I was wrong. It seems PTS Diana has altered something somewhere and now the site is unable to find the templates? I am not completely code savvy I am afraid. Would really appreciate some help so I can get my shop back online ASAP. 

Thanks,

Ben

Full error is:

SmartyException in smarty_internal_template.php line 678:Missing template name

1. in smarty_internal_template.php line 678
2. at Smarty_Internal_Template->__get('source') in smarty_internal_templatebase.php line 119
3. at Smarty_Internal_TemplateBase->fetch(null, null, 'layouts/layout-full-width.tpl', null, false, true, false) in SmartyDev.php line 41
4. at SmartyDev->fetch(null, null, 'layouts/layout-full-width.tpl') in FrontController.php line 671
5. at FrontControllerCore->smartyOutputContent(null) in FrontController.php line 655
6. at FrontControllerCore->display() in Controller.php line 225
7. at ControllerCore->run() in Dispatcher.php line 379
8. at DispatcherCore->dispatch() in index.php line 28

[lowpeak]

I have the same issue with the same Theme.

If I disable all overrides in Performance menu, then the Classic theme works ( or at least seems that is ok ).

 

G.