Menu and Block import broken, output shows warning

Importing menu and block fails and a warning is shown in the output.

Replicate from sample export

1. Copy the attached pre exported file with has one menu item and one custom block to site's config_sync directory
2. Import the menu and block with drush im --choice safe && drush ib --choice safe
3. Failed import for menu and block

Replicate from scratch

1. Create a menu and a custom block.
2. Export them with drush em && drush eb && drush cex
3. Spin up a new site
4. Copy structure_sync.data.yml to the new site's config_sync directory.
5. Import the menu and block with drush im --choice safe && drush ib --choice safe
6. Failed import for menu and block, see output log noted below.

Output log

drush im --choice safe
Importing blocks...
Using "Safe" import style
[notice] Custom blocks import started
[notice] Using "safe" style for custom blocks import
[warning] Invalid argument supplied for foreach() BlocksController.php:358
[notice] Flushing all caches
[notice] Successfully flushed caches
[notice] Successfully imported custom blocks

drush ib --choice safe
Importing menu links...
Using "Safe" import style
[notice] Menu links import started
[notice] Using "safe" style for menu links import
[warning] Invalid argument supplied for foreach() MenuLinksController.php:382
[notice] Flushing all caches
[notice] Successfully flushed caches
[notice] Successfully imported menu links

PS: Thanks for sharing and maintaining this very useful module.