Disconnected from the server when importing CWL

[a7032018]

Hi,

I am using BCO-App to import the CWL by CWL composer.
I got CWL example from here
https://github.com/ncbi/cwl-ngs-workflows-cbb/blob/master/workflows/RNA-Seq/rnaseq-alignment-quantification.cwl
Every time I import the CWL file, the webpage just get disconnected. When I click reconnect, it just likes starting a new BCO-App session without any pre-existing info inside.

I am looking forward to the solutions.