Hi,
Can you please share the logs to check further on this.If possible please share the code/notebook that you are trying.
How much memory have you allocated to the webservice? By default it is 500 mb and hence may not sufficient for your model.
You need to allocate higher memory to the webservice. You can pass a deployment configuration to deploy_from_model method. Refer here.
Please follow the below document to deploy a model to azure container instance.
https://docs.microsoft.com/en-us/azure/machine-learning/how-to-deploy-azure-container-instance
Thanks