Found error on 'AllowedPattern' for CidrBlock - Parameters section

[ChaturvediSulabh]

Request

• Bug
• Question

Details

Template contains errors.: Parameter 'PublicCidrBlockA' must match pattern (\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/(\d{1,2})

I got it resolved when using the pattern - '((\d{1,3}).){3}\d{1,3}/\d{1,2}'

[mickengland]

I got this: Template validation error: Parameter 'VPCSubnetCidrBlock' must match pattern (\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})/(\d{1,2})

[brynjellis]

I got the same issue as @mickengland. Has anyone found a resolution?