echter means “however”. When it opens the clause, the verb comes before the subject (inversion).
Connective adverbs · Bijwoorden
Het plan is goed. Echter is het duur.
The plan is good. However, it is expensive.
Hij wilde komen. Echter had hij geen tijd.
He wanted to come. However, he had no time.
Drag scrambled words into the right Dutch order and master inversion and the verb-final rule.