flow run failed The method run has invalid value for parameter 'Start approval to assigned to _1

[Altaf]

flow run failed:The method run has invalid value for parameter 'Start approval to assigned to _1'

I am getting above error while running button based flow.

I have configure flow which triggered based on power apps button.

Please find details attached here.  

[AsanKani]

1. You can once remove the Flow connection in PowerApps.

2. Then add flow connection again.

3. Again give coding in PowerApps button.

Now check...

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