On R77.30 version UUID looks like - {B6A5A8F0-9BFC-4440-9FDF-3E8EEC3EC70A}
On R80.10 version UUID looks like - 8da7e5ed-36f4-43d1-a29a-ff38c3a33805
So, which version we are talking about?
You should definitely have some traffic matched by this rule to see logs for it. Or it will say "No matches found for your search", without errors if the query is correct.
In R77.30 you can find a rule in SmartLog by these qeuries:
rule:{B6A5A8F0-9BFC-4440-9FDF-3E8EEC3EC70A} (Expecting <Rule Number>/<Policy Name> or <Rule UID>)
{B6A5A8F0-9BFC-4440-9FDF-3E8EEC3EC70A}
Not allowed expression and give the same errors as you have:
layer_uuid_rule_uuid:(*_{B6A5A8F0-9BFC-4440-9FDF-3E8EEC3EC70A})
layer_uuid_rule_uuid:({B6A5A8F0-9BFC-4440-9FDF-3E8EEC3EC70A})
In R80.10 Cloud Demo mode you can find traffic in logs for a rule with the following queries:
8da7e5ed-36f4-43d1-a29a-ff38c3a33805
layer_uuid_rule_uuid:(*_8da7e5ed-36f4-43d1-a29a-ff38c3a33805)