Explore error: "Network error" when selecting a dashboard data filter

Issue symptoms

I added a data filter to my custom dashboard in Explore. When I attempt to apply a filter value while editing the dashboard, I see the error Network error.

Resolution steps

The error Network error is displayed when the dataset or report associated with the filter has been removed.

To resolve the error, remove the current filter and add a new filter. This will ensure the new filter is  linked to a dataset for the current report on the dashboard.

For more details, see the article: Best practices for using dashboard filters.