Sorry for the delay in response.
Thank you for sharing the link! I found what is causing this error. I created an update (v2.2) of plugin to fix this problem. Soon it will appear in the repository.
You can add the toolbar to any place of your website by two methods.
1 method) Add the toolbar directly to a theme files.
For this, just add one of the following code (both variants do the same) to needed place (where you want to display the toolbar) in your theme files:
<?php echo do_shortcode("[smbtoolbar]"); ?>
<?php echo smbtoolbar_shortcode(); ?>
Note: Changes will be lost when you update the theme.
2 method) Add the toolbar by creating the PHP function.
For this, you can use my another plugin which named “My Custom Functions“.
This method is more difficult, but your changes will not be lost when you update the theme.
I do freelance so if you will need I can help you for a small fee.
Regards,
Arthur