Dataset not showing Blog & Categories option

Can anyone help me with this? When connecting to a collection, I cannot see any Blog or Categories option. It is there the last time I checked.

Also, when adding a dataset, the dataset icon on the canvas can’t be moved. It seems that there’s a bug happening. Do you know how to disable the content manager and reenable it again.

I remembered that when I enabled Content Manager, there was an error that occurred and the next thing that happened is this.

Thank you in advance.