Bitcoin ABC version 0.30.2 is now available from:
https://download.bitcoinabc.org/0.30.2/
This release fixes a bug introduced in version 0.30.1 that affects nodes running with Chronik enabled. Under some rare circumstances the bug could cause Chronik to crash. Only node operators running Chronik (disabled by default) are affected. If you encountered the issue, please update your node to solve it. No reindex is required.