The problem as usual was mine alone.
In fact, the block that created the error is the one in the image, which recalled non-existent data from the remote cloud.
Once the block is eliminated, the error no longer appears.
But it created other problems for me that I will try to solve.
Thanks again, you couldn't solve the problem for me without having an overall view of the project.
Once again I've wasted your time, sorry.
