Werk #12939: Fix crash in virtual host tree if there are no tags
| Component | Checks & agents |
| Title | Fix crash in virtual host tree if there are no tags |
| Date | Oct 11, 2021 |
| Checkmk Edition | Checkmk Raw (CRE) |
| Checkmk Version | 2.1.0b1 |
| Level | Trivial Change |
| Class | Bug Fix |
| Compatibility | Compatible - no manual interaction needed |
When creating a virtual Host tree there was an AttributeError when no TAGS are set.
