program crashed when I try to save the output to files

[edinhui]

when I try to save the output from the serial to files,

1. I click the export button, it will pop out a window to a directory
2. I change the directory to my location,
3. I create a new subdirectory and rename the directory
4. program crashed

and it will happen when I try to use the file save function

[wh201906]

Please provide the app version and the platform(Android/Windows/Linux/macOS) you are using.
Did you specify the filename when saving the file?