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If you're still seeing the "no migrations found" error, there are a few steps you can take to troubleshoot the issue. Let's systematically address this:

### 1. **Verify Migration YAML Files Are Loaded**

Ensure that Drupal is loading your migration YAML files. You can do this by checking the active configuration.

- **Check Active Configuration:**

   Run the following Drush command to list the active migrations:

   ```bash
   drush cget migrate_plus.migration.wordpress_files
   drush cget migrate_plus.migration.wordpress_media
   ```

   If these commands return `migrate_plus.migration.wordpress_files` or `migrate_plus.migration.wordpress_media` configurations, the migration YAML files are loaded. If they don’t return anything, the files are not being loaded into Drupal.

### 2. **Check Migration Status**

List all available migrations using:

```bash
drush migrate-status
```

This should show a list of all the migrations that Drupal recognizes. If your migrations (`wordpress_files`, `wordpress_media`) are not listed, then Drupal hasn't picked them up.

### 3. **Ensure the YAML Files Are in the Correct Directory**

Make sure your migration YAML files are located in the `config/install/` directory of your custom module:

```
modules/custom/wordpress_media_migration/config/install/
```

### 4. **Check File Naming and Syntax**

Ensure that the YAML files are correctly named and free from syntax errors:

- **File Names:**
  - `migrate_plus.migration.wordpress_files.yml`
  - `migrate_plus.migration.wordpress_media.yml`

- **Syntax:** Even a small syntax error in the YAML can prevent Drupal from loading the migration. Double-check your YAML files for correct indentation and structure.

### 5. **Clear Cache**

Clear the Drupal cache to ensure that any changes are recognized:

```bash
drush cr
```

### 6. **Check Module Installation**

Ensure your custom module is enabled. You can check with:

```bash
drush pm:list | grep wordpress_media_migration
```

If your module isn't enabled, you can enable it:

```bash
drush en wordpress_media_migration
```

### 7. **Check the Migration Group**

Ensure that your migration is assigned to a correct group (if any). If you haven't defined a specific group, it should default to the `default` group.

- **Migration Group Example in YAML:**

   ```yaml
   migration_group: default
   ```

### 8. **Re-import Configuration**

If the migration files were added after the module was installed, you might need to re-import the configuration:

```bash
drush cim --partial
```

### 9. **Reinstall the Module**

If all else fails, try uninstalling and reinstalling your custom module to ensure the configuration is picked up:

```bash
drush pmu wordpress_media_migration -y
drush en wordpress_media_migration -y
```

### Conclusion

By carefully following these steps, you should be able to identify why your migrations are not being recognized. Often, the issue comes down to incorrect file paths, names, or a simple configuration error. If after these steps you still encounter issues, it may be useful to check Drupal’s logs for more specific error messages using:

```bash
drush watchdog:show
``` 

This might provide more insight into what is going wrong.
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