Selected tests is trying to access data from a NoneType

[2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 498, in <module>

 [2020/05/06 21:13:03.679]     main()  # pylint: disable=no-value-for-parameter

 [2020/05/06 21:13:03.679]   File "/data/mci/fbc5e0e7b726bb8f530a138052af17b6/venv/lib/python3.7/site-packages/click/core.py", line 829, in __call__

 [2020/05/06 21:13:03.679]     return self.main(*args, **kwargs)

 [2020/05/06 21:13:03.679]   File "/data/mci/fbc5e0e7b726bb8f530a138052af17b6/venv/lib/python3.7/site-packages/click/core.py", line 782, in main

 [2020/05/06 21:13:03.679]     rv = self.invoke(ctx)

 [2020/05/06 21:13:03.679]   File "/data/mci/fbc5e0e7b726bb8f530a138052af17b6/venv/lib/python3.7/site-packages/click/core.py", line 1066, in invoke

 [2020/05/06 21:13:03.679]     return ctx.invoke(self.callback, **ctx.params)

 [2020/05/06 21:13:03.679]   File "/data/mci/fbc5e0e7b726bb8f530a138052af17b6/venv/lib/python3.7/site-packages/click/core.py", line 610, in invoke

 [2020/05/06 21:13:03.679]     return callback(*args, **kwargs)

 [2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 493, in main

 [2020/05/06 21:13:03.679]     task_expansions, repos, origin_build_variants)

 [2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 423, in run

 [2020/05/06 21:13:03.679]     changed_files)

 [2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 383, in _get_task_configs

 [2020/05/06 21:13:03.679]     selected_tests_variant_expansions, related_tasks, build_variant_config)

 [2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 327, in _get_task_configs_for_task_mappings

 [2020/05/06 21:13:03.679]     build_variant_config)

 [2020/05/06 21:13:03.679]   File "buildscripts/selected_tests.py", line 246, in _get_evg_task_config

 [2020/05/06 21:13:03.679]     task_vars = task.run_tests_command["vars"]

 [2020/05/06 21:13:03.679] TypeError: 'NoneType' object is not subscriptable

 [2020/05/06 21:13:03.747] Command failed: command encountered problem: error waiting on process 'd205ecea-4c74-4768-990d-07df3c320cc4': exit status 1

 [2020/05/06 21:13:03.747] Task completed - FAILURE.

 [2020/05/06 21:13:03.750] Running post-task commands.