Hi @tasoskouk
The post content block is not supported when using front-end rendering. You can show the post excerpt using the dynamic values feature in any Cwicly text based block (e.g. Paragraph, Heading, etc).
In order to show the full post with front-end rendering, it requires some custom code and there are security and maintenance considerations when choosing the best approach for this, so care should be taken.
So knowing exactly what content you want to show and how it will be presented is required to properly address this
I had a quick look at the link you provided and can’t see any filters on the page, so it is not clear what is or is not working. Please provide a bit more information about what you have tried and what didn’t work for you.