Error occurred while loading tag information

Hi everybody,
starting some weeks ago, I cant view trend in my application, the console print the message in subject.
in the tag three from the designer I can see correctly the value of the tags.
I m sorry but I don’t understand what’s the problem.
Thanks in advance, Enrico.

Can you give us any more information, like the text of any errors and the configuration of the tags you are trying to trend? What changed a few weeks ago?