Uncaught (in promise) TypeError: _.contains is not a function

TensorBoard running under Ubuntu Chromium Web Browser.
Switch to Show Code mode, select a python file and the error like this one occurs:
```
(index):12064 Uncaught (in promise) TypeError: _.contains is not a function
    at (index):12064
    at Array.filter (<anonymous>)
    at HTMLElement._filterFileTracebacksByDebugWatches ((index):12064)
    at (index):12058
```