Giving an error when adding it to blog

I have just started to use Image Slider but I am having an issue when I try to insert it on a blog. I manage to use it successfully in a plain page, but when I create a blogpost and added it it gives me the error message I attached below.

If I add the blogpost without the plugin I have no problem. If I add the plugin and click publish, I get the error message. If I click back and I go to the blog post, the plugin shows a macro rendering error?

Is it me doing something wrong or there is some bug of sort? thx

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