Terragrunt with local modules - terraform

Question

I'm trying to use terragrunt to access a local module using the live/remote double-repo techinique discussed in the Terragrunt documentation.
When I run terragrunt plan locally, all is well, and I get no errors.
But when I run it from a second repo, I get these errors:
Upgrading modules...
- common in
╷
│ Error: Unreadable module directory
│
│ Unable to evaluate directory symlink: lstat ../common: no such file or
│ directory
╵
╷
│ Error: Failed to read module directory
│
│ Module directory does not exist or cannot be read.
╵
╷
│ Error: Unreadable module directory
│
│ Unable to evaluate directory symlink: lstat ../common: no such file or
│ directory
╵
╷
│ Error: Failed to read module directory
│
│ Module directory does not exist or cannot be read.
╵
Here the path hierarchy in the "Remote" repo:
├project
├──terragrunt.hcl
├──common
├──main.tf
├──my-stack
├── main.tf
├──terragrunt.hcl
The code for project/my-stack/main.tf is:
module "common" {
source = "../common/"
}
...
For project/my-stack/terragrunt.hcl:
include "root" {
path = find_in_parent_folders()
}
And for project/terragrunt.hcl:
remote_state{...}
In the above scenarios, all is good and terragrunt runs without error. The errors occur only when running from the "live` repo.
Here the path hierarchy in the "Live" repo:
├live
├──terragrunt.hcl
├──my-live-stack
├──terragrunt.hcl
For live/my-live-stack/terragrunt.hcl:
terraform {
source = "git::git#bitbucket.com:my-company/my-repo.git//my-project?ref=dev"
}
include "root" {
path = find_in_parent_folders()
}
And for project/terragrunt.hcl:
remote_state{...}
I've tried adding terraform{} commands and other recommended command blocks, but none seem to work. There must be something simple that I am doing wrong here.
EDIT: It turns out the git commits had not been applied in the ../common directory, hence no files existed and so the error message was correct.