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My LaunchTemplate looks like this:

const spotWorkersLaunchTemplate = new aws.ec2.LaunchTemplate('spot-workers', {
  imageId: 'ami-067bfa3d76de7a6b7',
  iamInstanceProfile: {
    arn: spotPricingProfile.arn,
    name: spotPricingProfile.name,
  },
});

Unfortunately, we're not providing a great error message here (hoping to improve that with https://github.com/pulumi/pulumi/issues/5586). I suspect you should not be specifying both

arn

and

name

on

iamInstanceProfile

.

@gentle-diamond-70147 thanks, that was it!