Troubleshooting

Common issues and solutions

1. Contract calls fail with EVM error: NotActivated

The contract has been compiled at a newer EVM version than supported by Alpen. Ensure the EVM version of the compiler is set to Prague.

2. I get Could Not Fetch chain ID error on my wallet

Alpen testnet was updated from Shanghai to Prague specifications on December 4, 2025, doing a network regenesis with a different chain ID. Check that your wallet is using the current chain ID.