Shortcode not working

Hello everybody.
My problem:
I want to include csv files in Hugo tables and i have found a nice shortcode, which willl do just that.

But: after deploying the shortcode i do NOT see a table filled with my CSV Data but the HTML sourcecode of that table.

From what i have understood this is a common security issue an can be solved with markdownify, but i really do not understand how.
Can someone point me in the right direction?
Thanks alot!

It’s a little (or: very) hard to determine what’s going on. But, and I’m guessing here, you may want to look at safeHTML | Hugo

If it’s possible to share your site’s source (GitHub link?) it would be much easier to help you.