# Problem visualizing graphs having Young tableaux at vertices

I am trying to visualize the crystal graph associated to the tensor product of symmetric representations of a Kac-Moody algebra. An example of the code I am trying to run is the following.

```
sage: c=crystals.Tableaux('A2',shape=[2,1])
sage: G=c.digraph()
sage: view(G)
An error occurred.
...
Latex error
```

When called, the function view(G) gives a latex error, which I have not reported in its entirety. This seems to occur only in case the graph G has tableaux for vertices. In other instances, the function view seems to work fine. Is there a remedy to this issue? Should I install additional packages?

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