[ui.internal.items.ItemUIRegistryImpl] - Cannot retrieve color item Last_Update for widget

Hi, whats wrong please ? Can I inspect concrete information about items/sitemap missing/not used items via karaf ?
Maybe missing/not used/not defined/without valid state in sitemap labelcolor/valuecolor ?

  • Platform information:
    • Hardware: Rpi4 4GB
    • OS: Raspbian Buster
    • Java Runtime Environment: Java 8
    • openHAB version: last 2.5

This question is a bit like “My cat is sick. What’s wrong?”
You’ll either have to look more closely yourself, or share more information for other’s opinions.

That’s a good guess, yes. And it probably involves being configured to look at an Item named “Last_Update”.
Have a look through your sitemap at the color parameters, see what looks odd.