Can't display the stack details

[kanglue]

Traceback (most recent call last): File "/home/jl/miniconda3/envs/vsumm/bin/pystack", line 10, in sys.exit(main()) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/click/core.py", line 700, in call return self.main(*args, **kwargs) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/click/core.py", line 680, in main rv = self.invoke(ctx) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/click/core.py", line 873, in invoke return ctx.invoke(self.callback, **ctx.params) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/click/core.py", line 508, in invoke return callback(*args, **kwargs) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/pystack.py", line 109, in main return print_stack(pid, include_greenlet, debugger, verbose) File "/home/jl/miniconda3/envs/vsumm/lib/python3.7/site-packages/pystack.py", line 89, in print_stack sys.stdout.write(chunk) TypeError: write() argument must be str, not bytes