Then use the post block instead:
Docs:
And you need to put the api link in the url as I poste before
https://kodular-community-uploads.s3.dualstack.eu-west-1.amazonaws.com/original/3X/2/4/24c9ce154b47257f56d2b01becd327f625575a16.png
If you want to post text use this block:

If you want to post a file use this block:

Example use:
See here for a good example use by taifun (see the post block) :