Unexpected token u in JSON at position 0

SyntaxError: Unexpected token u in JSON at position 0

at JSON.parse (<anonymous>)

at Function.success (https://lib/WAGame.js:2:2133940)

at Object.success (https://lib/WAGame.js:2:585171)

at _ (https://lib/WAGame.js:2:1079455)

at v (https://lib/WAGame.js:2:1079693)

at https://lib/WAGame.js:2:1081084

at Object.u (https://lib/WAGame.js:2:77731)

微信版本：7.0.19