Hi @kris,
Sorry to hear you’re experiencing trouble with this.
This sounds unusual as I cannot reproduce this error on my end.
If you were not aware, to view ACF Groups with Frontend Rendering, the API REST must be enabled.
To do this, either enable the “Show in REST API” setting for the desired ACF Groups or turn off the “Require ACF API REST” option in Cwicly Settings → Advanced Settings.
Note that enabling the REST API for your ACF fields allows any user to query these fields when using Frontend Rendering with Cwicly.
If you prefer to limit access, you can turn ON the “Require ACF API REST” option in Cwicly settings.
Read more about it at ACF | WP REST API Integration.
It is important to note that frontend rendering can have certain limitations, which should not be conflated with bugs.
If you have experienced bugs with frontend rendering please detail what they are so we may solve these as soon as possible.
Thank you in advance.