workshop.yml is failing

[nadimm90]

I am trying to deploy the workshop.yml AWS CloudFormation template as requested in my aws account before starting lab 1 ,2 and 3.
I am filling the below variables as empty strings :

EETeamRoleArn: ' '
EventEngineRoleName: ' '

and I am receiving the below error

1 validation error detected: Value 'arn:aws:sts::197106845987:assumed-role/''/MasterKey' at 'ownerArn' failed to satisfy constraint: Member must satisfy regular expression pattern: ^arn:(aws|aws-cn|aws-us-gov|aws-iso|aws-iso-b):(iam|sts)::\d+:(root|(user/[\w+=/:,.@-]{1,64}|federated-user/[\w+=/:,.@-]{2,32}|assumed-role/[\w+=:,.@-]{1,64}/[\w+=,.@-]{1,64}))$

[brtrvn]

You need to leave the EventEngineRoleName field with its default value unless you're participating in a guided experience with AWS facilitators who may ask you to change the value of that parameter.