TypeError: Cannot read property 'sync' of undefined

gistfile1.txt

Uncaught (in promise) TypeError: Cannot read property 'sync' of undefined
    at DB.eval (DB.ts?b8fd:204)
    at step (DB.js:32)
    at Object.eval [as next] (DB.js:13)
    at fulfilled (DB.js:4)
(anonymous) @ DB.ts?b8fd:204
step @ DB.js:32
(anonymous) @ DB.js:13
fulfilled @ DB.js:4
Promise.then (async)
step @ DB.js:6
fulfilled @ DB.js:4
Promise.then (async)
step @ DB.js:6
(anonymous) @ DB.js:7
__awaiter @ DB.js:3
DB.sync @ DB.ts?b8fd:196
(anonymous) @ Controller.ts?975d:31
step @ Controller.js:32
(anonymous) @ Controller.js:13
fulfilled @ Controller.js:4
Promise.then (async)
step @ Controller.js:6
(anonymous) @ Controller.js:7
__awaiter @ Controller.js:3
Controller.run @ Controller.ts?975d:26
(anonymous) @ Sync.ts?839d:8
step @ Sync.js:32
(anonymous) @ Sync.js:13
fulfilled @ Sync.js:4
Promise.then (async)
step @ Sync.js:6
(anonymous) @ Sync.js:7
__awaiter @ Sync.js:3
start @ Sync.ts?839d:5
_callee$ @ Sync.worker.ts?652e:21
tryCatch @ runtime.js?a786:45
invoke @ runtime.js?a786:271
prototype.<computed> @ runtime.js?a786:97
asyncGeneratorStep @ asyncToGenerator.js?933e:3
_next @ asyncToGenerator.js?933e:25
(anonymous) @ asyncToGenerator.js?933e:32
(anonymous) @ asyncToGenerator.js?933e:21
(anonymous) @ Sync.worker.ts?652e:9