Here are the steps that I went through:

1. Stop and tear down fabric
2. Start fabric
3. Create a Business network using yo `hyperledger-composer`
4. Create .bna archive and install it
5. Start network with version 0.0.1
6. Import card to the playground

All these steps work fine, but when I start playground and try to upgrade business network with my changes, in a browser it gets stuck on

```
Please Wait: Your new business network is being upgraded
Upgrading business network using PeerAdmin@hlfv1 (2/2)

```

and never responds

Here what I see in logs of composer--playground:

> 
> info: [Hyperledger-Composer] :ConnectionProfileManager :getConnectionManagerByTyp Looking up a connection manager for type 0=hlfv1
> 
> 
> 

Maybe someone has already faced this kind of issue and knows how solve it? Or in the local environment, I should upgrade it manually? 

* P.S I am new to Composer, so all these steps I found in the
[Developer tutorial](https://hyperledger.github.io/composer/latest/tutorials/developer-tutorial)