I need to create a task in Planner by Power Automate using an Excel table, but an error message appears stating that the data type of the cell that has the task start date is in number format. I've made all the changes to Excel's date formats, but it always has the same error message.

Error: "OpenApiOperationParameterTypeConversionFailed. The 'inputs.parameters' of the 'Create_a_task' workflow operation of type 'OpenApiConnection' is not valid. Error Details: Input parameter 'body/startDateTime' must be of type 'String/date-time'. The runtime value '"44363"' to be converted does not have the expected format 'String/date-time'."
I've already changed to various date types in Excel and I've tried converting the timezone using Power Automate, but I still can't fix this error.