link dashboards don´t fix

What's the definition of your link?  Looks like it's set to View.apsx?NetObject=N:## which won't work from modern dashboards.  You should use the DetailsUrl item when possible.

Thank you very much for your prompt response. I am just doing it by DetailsUrl, but when I want to enter a node I get the error that I mentioned before

The Details URL needs to contain an actual URL, so it also needs to be a part of your dataset that you are returning.

Of course I understand, but in Details URL it doesn't let me paste a URL, I get a single potion that is name

Then you aren't including the Details URL in the dataset you are returning.  

excellent, that was what I needed. thanks a lot

another question, I need to make a dashboard of concurrent connections, but I can't get the table to make the query. what would be that database table that shows me the metric of concurrent connections? Thank you

Concurrent connections of what to what?  Can you provide a screenshot where you can see this metric elsewhere in the web interface?

I got OID for concurrent sessions for forti team and it brings me the data, but I can't get the table to build the widget in modern dashboards,

That information is pulled from an OID and MIB connection.  I think that's stored in the Orion.NPM.CustomPollers and other similarly named tables.  I'm going to be honest with you - I don't know much about this space because I just never had the exposure.

This really should be a separate thread since it's not on the original topic.