Hello Team,
Your issue is very straightforward.
The HTTP connector, which is the trigger you are using, requires a premium license.
To use the HTTP connector you need either the per flow or per user standalone license. None of the Microsoft 365 licenses support the use of premium connectors.
Per Flow and Per User Plans include a variety of data sources called “Connectors.” Microsoft has two tiers of Connectors – Standard and Premium. Both are included with either of the paid plans (Per Flow & Per User), the Dynamics 365 Plan and the PowerApp Plan, but not the Office 365 plans.Dec 2, 2019
To see what is included in each flow plan please refer to the official Microsoft documentation below-
https://www.interlink.com/blog/entry/radical-changes-to-microsoft-flow-now-called-power-automatehttps://flow.microsoft.com/en-us/pricing/
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