Field "sh_multi_user" does not exist in model "account.analytic.line"

Question

I'm trying to install addon "Assign Task To Multiple Users" on Odoo 16

Then there is an error:

Field "sh_multi_user" does not exist in model "account.analytic.line"

I'm confused it is about model "project.task" in the view xml file (please see below). Why it prompts does not exist in model "account.analytic.line"?

Here is detail of error:

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And here is the view xml file

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And here is model in this addon:

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I want to install this addon successfully.