Workflow design time could not be started - Logic App Standard | Azure function core tools 4.x version isn't supported in Logic App standard development

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Issue

I came across following error while switching workflow in visual studio code from code view to designer view in logic app standard

Workflow design time could not be started

Why it happened

The reason is that it is not finding the required Azure function library although I had installed the latest Azure Function Core tools SDK.

And, the actual reason is that Azure function core tools 4.x version isn't supported and won't work.

So,  Azure Functions Core Tools - 3.x version needs to be installed.

What to do

Go to github link - Azure Functions core tools and select the 3.x version Microsoft Installer (MSI) and download it

Run the setup

Accept the agreement

Specify Destination folder

Click on install

Let the Installation complete

Click on finish, and check .

For me it was still giving the same error -  no.. nothing to worry.

I just restarted the machine and all was set.