Since the replacement of using Almanac devices instead of the Drydock hosts implementation, it seems you cannot create the replacement blueprint any more. You get this (sadly truncated) stack trace:{P1857}
However, it seems the fix was rather simple since this fixed it for me:
```
diff --git a/src/applications/drydock/controller/DrydockBlueprintEditController.php b/src/applications/drydock/controller/DrydockBlueprintEditController.php
index 1c75bf7..e94ca6a 100644
--- a/src/applications/drydock/controller/DrydockBlueprintEditController.php
+++ b/src/applications/drydock/controller/DrydockBlueprintEditController.php
@@ -34,6 +34,7 @@ final class DrydockBlueprintEditController extends DrydockBlueprintController {
}
$blueprint = DrydockBlueprint::initializeNewBlueprint($viewer);
+ $blueprint->attachImplementation($impl);
$blueprint->setClassName($class);
$cancel_uri = $this->getApplicationURI('blueprint/');
}
```