Github user dangogh commented on the issue:
https://github.com/apache/incubator-trafficcontrol/pull/522
and for the DS without a profile, I failed to put in a regex and got a
crash rather than an error popup:
```Traffic Ops fatal error occurred while processing your request.
Error at line 28 ($morbo->run($app);)
Please supply a host regular expression at
.../incubator-trafficcontrol/traffic_ops/app/lib/MojoPlugins/DeliveryService.pm
line 178.
....
called at
.../incubator-trafficcontrol/traffic_ops/app/lib/UI/DeliveryService.pm line 385
```
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