Error: Variables not allowed

╷
│ Error: Variables not allowed
│
│   on <value for var.requires_compatibilities> line 1:
│   (source code not available)
│
│ Variables may not be used here.
╵

Solution: make sure you variables values are defined inside quotes your_var = "your value"

Related

• Error: No value for required variable

See also

• terraform plan: [ -refresh-only | -lock=false | -target | -var-file | will be created | --help], Terraform plan errors, Terraform plan examples, Terraform plan execution errors, (known after apply)
• Terraform variables, types, env variables, variables.tf, .tfvars, nullable, validation, terraform.tfvars