DEBUG: wp_remote_get to https://app.fertilsuma.com.ar/api/eula/contrato/web
DEBUG: arguments: Array ( [timeout] => 5 )
DEBUG: success getting URL

If you use WordPress without Gutenberg, you can use this Shortcode (copy with Strg+A, paste to TEXT-editor!):

DEBUG: basenode: no basenode defined
DEBUG: template:

DEBUG: We have a Problem with JSON here:
Either we got no JSON from the API. Or the basenode-parameter is not ok.
Switch on the Debugmode of the Plugin!
DEBUG: result:

We have a Problem with JSON here:
Either we got no JSON from the API. Or the basenode-parameter is not ok.
Switch on the Debugmode of the Plugin!
api-answer:
Inspect JSON: Copypaste (click in box, Strg-A marks all, then insert into clipboard) the JSON from the following box to https://jsoneditoronline.org):

template:

result:

Plugin-Settings (see Plugin options):
Cache: disabled
oauth Bearer Accesskey:
http-Header default Useragent:

the real result:
We have a Problem with JSON here:
Either we got no JSON from the API. Or the basenode-parameter is not ok.
Switch on the Debugmode of the Plugin!