[console error] unexpected javascript error from running app

[yossi608]

DartPad displayed an unexpected error in the console:

compileNewDDCReload
Unexpected Kernel Format Version 124 (expected 125)
#0      BinaryBuilder._verifyComponentInitialBytes (package:kernel/binary/ast_from_binary.dart:857:7)
#1      BinaryBuilder.readComponent.<anonymous closure> (package:kernel/binary/ast_from_binary.dart:687:7)
#2      Timeline.timeSync (dart:developer/timeline.dart:188:22)
#3      BinaryBuilder.readComponent (package:kernel/binary/ast_from_binary.dart:685:21)
#4      _compile (package:dev_compiler/src/command/command.dart:371:9)
<asynchronous suspension>
#5      _CompilerWorker.performRequest (package:dev_compiler/ddc.dart:76:18)
<asynchronous suspension>
#6      AsyncWorkerLoop.run (package:bazel_worker/src/worker/async_worker_loop.dart:35:20)
<asynchronous suspension>
#7      internalMain (package:dev_compiler/ddc.dart:36:5)
<asynchronous suspension>

Script error.