If a movie critic describes a film as "milk-and-water," what are they likely implying?

• The required answer - The film is dull and lacks impact.• Milk - and - waterEnglish Meaning: Insipid / dull / weak / lacking the will or ability to act effectively.Bangla Meaning: পানসে বা দুর্বল কথাবার্তা / কার্যকর ভূমিকা রাখতে অক্ষম।Example Sentence:- This is a milk-and-water game.Source:1. Cambridge Dictionary.2. Accessible Dictionary by Bangla Academy.