9 hours ago
You appear to have a selection (to the left of "Damage") so the bucket-fill won't be enabled until the pointer is in that selection. So remove the selection Select > None.
Probably not the case here, but in case of trouble, displaying the Tool options (tab with easel icon on the left) is more useful than the Images list.
Probably not the case here, but in case of trouble, displaying the Tool options (tab with easel icon on the left) is more useful than the Images list.