[GELÖST] Simple Template: Contact form does not work

Hi
I got the Simple Template installed yesterday but dont get my e-mail/contact form to work. And then I realised, that it also doesn't work on the demo page: demo.joomlaplates.de/simple/#contact

whenever you submit the form, you get an error message. On my website, I get the same.

How can this be fixed?!

And one more very strange problem with this: In the demo template, there is this handsome guy in the background, layout bB2. When I replace this image with a different one, it won't show up. When I change the image back to the handsome guy, it's there. Images are same file format, same size...

Any ideas on this one???

Esther

here a screenshot of the errror message (its disappearing fast!)

Did you really confirm the change with save?
Please also always delete the Astroid, Joomla and browser cache.

save after I changed the image, you mean? Yes I did - but its not showing the imagesee my 3 screenshots where I saved

When email sending is not working, please check if the Joomla send emails at all!
Joomla System > Global Config > Server > Mail settings