WP-CLI compatibility issue

Using swift-performance-lite 2.0.

When using WP-CLI comamnds, all I get are the following PHP notices, a user list, and no regular response:

Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 400
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 404
+----+--------------+------------------+-----------------------+---------------------+---------------+
| ID | user_login   | display_name     | user_email            | user_registered     | roles         |
+----+--------------+------------------+-----------------------+---------------------+---------------+
REDACTED
+----+--------------+------------------+-----------------------+---------------------+---------------+

I deactivate the plugin and the WP-CLI functionality returns.

I tried reinstalling the plugin. On initial activation using WP-CLI, I see:

Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 400
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 404
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1230
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1211
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1267
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1276
Notice: Undefined property: Exception::$getMessage in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1069
Plugin 'swift-performance-lite' activated.
Success: Activated 1 of 1 plugins.
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1283
Notice: Undefined index: HTTP_HOST in /home/user/public_html/wp-content/plugins/swift-performance-lite/performance.php on line 1291

Subsequent WP-CLI commands show the initial behavior above; the 2 notices, but now a plugin list.