Upgrade to 2.11 caused issue with -pl (plot) in transmission_main_example

[kt-simpson]

Describe the bug
After upgrading to 2.11 the path plot of the "transmission_main_example" fails

To Reproduce
Run "transmission_main_example" with -pl enabled

Expected behavior
Expect to see Network Plot followed by Path Plot.
First is a network plot which is working as expected (screen capture provided).
Second plot from source_trx to destination_trx is failing (two excerpts from error are attached)

Screenshots

Environment:

• Python 3.11.7 | packaged by Anaconda, Inc. | (main, Dec 15 2023, 18:05:47) [MSC v.1916 64 bit (AMD64)] on win32

Additional context
I reverted back to 2.10 and plot feature worked as expected

[EstherLerouzic]

Thanks for reporting this ! This is now corrected in v2.11.1