https://build.chromium.org/p/chromium.fyi/builders/Site%20Isolation%20Android

Every build is failing with:

Traceback (most recent call last):
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/run.py", line 427, in run
    recipe_result = recipe_script.run(api, properties)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/loader.py", line 77, in run
    self.run_steps, properties, self.PROPERTIES, api=api)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/loader.py", line 544, in invoke_with_properties
    **additional_args)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/loader.py", line 505, in _invoke_with_properties
    return callable_obj(*props, **additional_args)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/recipes/chromium.py", line 35, in RunSteps
    api.chromium_tests.main_waterfall_steps(api)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/build/scripts/slave/recipe_modules/chromium_tests/api.py", line 831, in main_waterfall_steps
    bot_config)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/recipe_api.py", line 507, in _inner
    return func(*a, **kw)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/build/scripts/slave/recipe_modules/chromium_tests/api.py", line 208, in prepare_checkout
    bot_config, root_solution_revision)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/recipe_api.py", line 507, in _inner
    return func(*a, **kw)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/build/scripts/slave/recipe_modules/chromium_checkout/api.py", line 73, in ensure_checkout
    **kwargs)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/recipe_api.py", line 507, in _inner
    return func(*a, **kw)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/depot_tools/recipe_modules/bot_update/api.py", line 103, in ensure_checkout
    self.m.properties.get('patch_project'), cfg)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/recipe_api.py", line 507, in _inner
    return func(*a, **kw)
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/depot_tools/recipe_modules/gclient/api.py", line 331, in calculate_patch_root
    return cfg.solutions[0].name
  File "/b/rr/tmpFqLQJs/rw/checkout/infra/.recipe_deps/recipe_engine/recipe_engine/config.py", line 483, in __getitem__
    return self.data.__getitem__(index)
IndexError: list index out of range