Hello good.
This is my first time using this type of field and it may not do it correctly.
When adding a field of type "Field group", as indicated in the image, it causes me an error that completely blocks the Joomla administration:
2036 Using unsupported buffer type: 245 (parameter: 28)
When I directly delete the field created in mysql, I recover the previous situation and I can continue working.
I use the latest version of Joomla: 4.1.2 and I have the Community Builder Plugins to the latest versions.
Thanks!!