Serverless Framework Error: Single API Gateway Project - RootResourceId attribute of API Gateway RestAPI <id> doesn't exist

I am having a problem deploying my application in AWS with CloudFormation using the Serverless Framework.

I am using the "Single API Gateway Project" strategy for the deployment. I have my Backend divided into services, each with its directory inside the repo and its serverless.yml file.

To have a single API Gateway for each one of them, I first deploy a root service that creates said API Gateway for me and outputs the ApiGatewayRestApiId and ApiGatewayRestApiRootResourceId as I could see in the following document of the same Serverless Framework:

https://www.serverless.com/framework/docs/providers/aws/events/apigateway#easiest-and-cicd-friendly-example-of-using-shared-api-gateway-and-api-resources

My root service that creates the API Gateway is something like:

...
resources:
  Outputs:
    ApiGatewayRestApiId:
      Value:
        Ref: ApiGatewayRestApi
      Export:
        Name: ${self:provider.stage}-ApiGatewayRestApiId
    ApiGatewayRestApiRootResourceId:
      Value:
        Fn::GetAtt: 
          - ApiGatewayRestApi
          - RootResourceId
      Export:
        Name: ${self:provider.stage}-ApiGatewayRestApiRootResourceId
...

Then, from the rest of the microservices, I use those values ​​by importing them as follows:

service: name 
custom: 
  APP_ENV: ${env:SERVERLESS_APP} 
providers: 
  apiGateway: 
    restApiId: !ImportValue ${env:${self:custom.APP_ENV}_API_STAGE}-ApiGatewayRestApiId
    restApiRootResourceId: !ImportValue ${env:${self:custom.APP_ENV}_API_STAGE}-ApiGatewayRestApiRootResourceId
...

I never had any problems deploying until today, when I tried to deploy only the root service. The error I am having is the following:

An error occurred: root-beta - Template error: RootResourceId attribute of API Gateway RestAPI d8zc1j912b doesn't exist.

I checked everywhere but I can't find the reason why I get this error.

• Operating System: linux
• Node Version: 13.10.0
• Framework Version: 1.60.0
• PluginVersion: 3.8.4
• SDK Version: 2.3.2
• Components Core Version: 1.1.2
• Components CLI Version: 1.6.0