Ok, found this info. And it’s now working.
This isn’t made very clear on the install. Just says, somewhere (near the bottom), but the position is important. Please update to make this clearer.

Manually edit index.php when installing Shoppica

This section shows how to easily modify /index.php manually, so you won’t need to overwrite it with the one shipped with the Shoppica package. It is a very easy task – only two lines of code must be added. Here’s how:

1 Open index.php with your preferred text editor.

2 Find the following two lines (approximately line 213):

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// Front Controller
$controller = new Front($registry);
3 Insert these two lines immediately* after them:

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// TB
$controller->dispatch(new Action(‘common/tb’, array(‘front’ => $controller)), new Action(‘error/not_found’));
* If you are installing Shoppica 2 along with Shoppica 1, then the Shoppica 1 modification to index.php should always be after the one of Shoppica 2.

4 Save the index.php file

That’s it. Now you don’t have to replace the index.php file with the one provided by Shoppica 2 package, as the above addition is the only change we’ve made to this file.

@zuzuweb

Can we get the website url, admin and ftp access, so we could assist you?

You can use hidepost to share private information with the support staff.

Best,
ThemeBurn team

Please note, I have very few customisations made here, so I don’t mind if it gets wiped… (I had a previous version installed with LOTS of customisations but accidentally wiped it when upgrading, so I’m starting from scratch.)

@zuzuweb

Glad you’ve managed to solve the problem!

Nice use of colors, by the way

Best,
ThemeBurn team