The UI freezes or is slow during autocompletion (e.g. trying to create a filter for a Source namespace), and ends up with an error (502 iirc). This seems to happen when there's no metric found in prometheus.

Reproduce:

• Deploy netobserv with DOWNSTREAM_DEPLOYMENT set to false or unset
• Open the console plugin
• Try adding a filter such as Source Namespace : netobserv

Result: very slow to add that filter (seems not responsive) ... eventually the filter is added, and showing an error (502 iirc) via the text input tooltip