There two sentences with "mist" instead of "must" and "inquery" instead of "inquiry":
The details of your inquery mist be at least $minLength$ characters.
The details of your inquery mist be at most $maxLength$ characters.
Both strings can appear on the Contact page under the "Please describe your problem" block at corresponding conditions after pressing "Submit" button.
P.S. for the sake of ease of localization I suggest to add plural forms for each of these sentences.