# general


11/15/2023, 12:02 PM
Hi everyone. I'm new to this slack, but I've been using pulumi for more than a year now. Recently I've have a error message says,
Traceback (most recent call last):
File "/foo/bar/bin/pulumi-language-python-exec", line 197, in <module>
File "/foo/bar/python3.10/asyncio/", line 649, in run_until_complete
return future.result()
File "/foo/bar/site-packages/pulumi/runtime/", line 137, in run_in_stack
await run_pulumi_func(lambda: Stack(func))
File "/foo/bar/site-packages/pulumi/runtime/", line 51, in run_pulumi_func
await wait_for_rpcs()
File "/foo/bar/site-packages/pulumi/runtime/", line 83, in wait_for_rpcs
raise exn from cause
File "/foo/bar/site-packages/pulumi/runtime/", line 71, in rpc_wrapper
result = await rpc
File "/foo/bar/site-packages/pulumi/runtime/", line 1029, in do_register
File "/foo/bar/site-packages/pulumi/runtime/", line 1108, in resolve_outputs
translated_value = translate_output_properties(
File "/foo/bar/site-packages/pulumi/runtime/", line 987, in translate_output_properties
element_type = _get_list_element_type(typ)
File "/foo/bar/site-packages/pulumi/runtime/", line 162, in _get_list_element_type
raise AssertionError(f"Unexpected type. Expected 'list' got '{typ}'")
AssertionError: Unexpected type. Expected 'list' got '<class 'str'>'
However, when I run
pulumi up
with the same stack again a couple hours ago, surprisingly it works. Does anybody have similar issue? I'm pretty confused about what went wrong and why it back to work in the last hour. I'm not sure if this is the best place to ask such question. If this channel isn't the best place, I'm happy to del this and post itsomewhere else. Thanks and Happy coding.