Failed type check line 1193 pos 14

Hi there,
This is the error when I want to test my Interne speed and I don’t know what is wrong. I ran the test many time and the result was the same. Can anyone tell me is there a problem with my Internet connections or the program have some errors ?
Thanks !

DARTest: In-App View
Caught ‘bootstrap_impl’: Failed type check: line 1193 pos 14: type ‘LinkedHashMapImplementation’ is not assignable to type ‘HipsterModel’ of ‘value’. Took 13 ms
