An exception occurred: [XF\Db\Exception] Connection refused in src/XF/Db/Mysqli/Adapter.php on line 172

1. XF\Db\Mysqli\Adapter->makeConnection() in src/XF/Db/Mysqli/Adapter.php at line 31
2. XF\Db\Mysqli\Adapter->getConnection() in src/XF/Db/AbstractAdapter.php at line 62
3. XF\Db\AbstractAdapter->connect() in src/XF/Db/Mysqli/Adapter.php at line 116
4. XF\Db\Mysqli\Adapter->escapeString() in src/XF/Db/AbstractAdapter.php at line 518
5. XF\Db\AbstractAdapter->quote() in src/XF/Db/AbstractAdapter.php at line 496
6. XF\Db\AbstractAdapter->quote() in src/XF/DataRegistry.php at line 172
7. XF\DataRegistry->readFromDb() in src/XF/DataRegistry.php at line 102
8. XF\DataRegistry->get() in src/XF/DataRegistry.php at line 271
9. XF\DataRegistry->offsetGet() in src/XF/App.php at line 2176
10. XF\App->XF\{closure}() in src/XF/Container.php at line 38
11. XF\Container->offsetGet() in src/XF/App.php at line 2797
12. XF\App->setupAddOnComposerAutoload() in src/XF/App.php at line 2274
13. XF\App->setup() in src/XF/Pub/App.php at line 116
14. XF\Pub\App->setup() in src/XF.php at line 787
15. XF::setupApp() in src/XF.php at line 810
16. XF::runApp() in index.php at line 23