the chrome /firefox have a red box,
it said:
Error saving LevelSession: 422 Unprocessable Entity[{“message”:“invalid type: null (expected object)”,“code”:0,“dataPath”:"/state/topScores/0",“schemaPath”:"/properties/state/properties/topScores/items/type",“subErrors”:null,“stack”:"Error: invalid type: null (expected object)\n at new ValidationError (/home/coco/codecombat/node_modules/tv4/tv4.js:1188:12)\n at ValidatorContext.createError (/home/coco/codecombat/node_modules/tv4/tv4.js:176:9)\n at ValidatorContext.validateType (/home/coco/codecombat/node_modules/tv4/tv4.js:559:14)\n at ValidatorContext.validateBasic (/home/coco/codecombat/node_modules/tv4/tv4.js:529:19)\n at ValidatorContext.validateAll (/home/coco/codecombat/node_modules/tv4/tv4.js:410:19)\n at ValidatorContext.validateArrayItems (/home/coco/codecombat/node_modules/tv4/tv4.js:723:21)\n at ValidatorContext.validateArray (/home/coco/codecombat/node_modules/tv4/tv4.js:656:11)\n at ValidatorContext.validateAll (/home/coco/codecombat/node_modules/tv4/tv4.js:413:11)\n at ValidatorContext.validateObjectProperties (/home/coco/codecombat/node_modules/tv4/tv4.js:786:21)\n at ValidatorContext.validateObject (/home/coco/codecombat/node_modules/tv4/tv4.js:737:11)\n at ValidatorContext.validateAll (/home/coco/codecombat/node_modules/tv4/tv4.js:414:11)\n at ValidatorContext.validateObjectProperties (/home/coco/codecombat/node_modules