Hello, I am working now on joomla 3.5.9 with VirtueMart 3.8.6 and Themler 5.17. in Chrome. Working not local, only on-line. My theme has crashed with error ( Sorry, an error has occurred. Please...

I dont know what to do. I have been an Artisteer customer for years, now, paying every year until this year because there was nothing new to pay for. Anyway, out comes Themler and it seems actually...