A 13-year-old girl for a month has been complaining of fatigability, dull pain in her right subcostal area, abdominal distension, and constipations. Abdominal palpation reveals positive Kehr, Murphy, and Ortner signs, while Desjardins and Mayo-Robson points are painless. Total bilirubin is 14.7 mcmol/L, predominantly indirect, ALT- 20 U/L, AST- 40 U/L, amylase - 6.3 mmol/L. Echocholecystography shows practically no contraction of the gallbladder. Make the provisional diagnosis: