Please I'm facing the error below, what may be the cause:

SQLSTATE[HY000] [2002] php_network_getaddresses: getaddrinfo for mysql.railway.internal failed: Name or service not known (Connection: mysql, SQL: select table_name as name, (data_length + index_length) as size, table_comment as comment, engine as engine, table_collation as collation from information_schema.tables where table_schema = 'railway' and table_type in ('BASE TABLE', 'SYSTEM VERSIONED') order by table_name)

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