I was not able to find anything useful through google, so: My Dart application worked fine. The next time I opened Darteditor and (without changing anything), it started it again, Darteditor showed Error
Exception interruption: severe failure, invalid object.
This error does not always appear, and even when it works, the application is still functioning. Darteditor does not give me any hit where this error occurs because the debugger claims that some source is not available.

Does anyone know why / when this error occurs and what to do to fix it?
EDIT 1: As suggested in the comments:
- Darteditor update
pub cache repairpub upgrade
Does not work
2:
, , EDIT 1. , . . Darteditor EDIT 1, . ... EDIT 1, , . , - , 3 EDIT 1 ?
3:
( )
, ...
, , , /. , ther Error:
NoUpdate (https://www.google.ch/xjs/_/js/k=xjs.ntp.en_US.mqcA3JMW-QU.O/m=jsa,ntp,pcc,csi/rt=j/d=1/t=zcms/rs=AItRSTO3mHFV3hPPmf2KYlzqp_GC2s-5GQ:119) : , .