Errors in pmm-agent.log for MySQL instance

 -11T00:12:16+03:00" level=error msg="Error scraping for collect.engine_tokudb_status: Error 1286: Unknown storage engine 'TOKUDB'" source="exporter.go:116"  agentID=/agent_id/46d9e943-20ed-43a1-b9c6-a5a0
-11T00:12:16+03:00" level=error msg="Error scraping for collect.heartbeat: Error 1146: Table 'heartbeat.heartbeat' doesn't exist" source="exporter.go:116

 Server version: 5.7.25-0ubuntu0.16.04.2-log (Ubuntu)

mysql> show engines;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine             | Support | Comment                                                        | Transactions | XA   | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| CSV                | YES     | CSV storage engine                                             | NO           | NO   | NO         |
| MRG_MYISAM         | YES     | Collection of identical MyISAM tables                          | NO           | NO   | NO         |
| InnoDB             | DEFAULT | Supports transactions, row-level locking, and foreign keys     | YES          | YES  | YES        |
| BLACKHOLE          | YES     | /dev/null storage engine (anything you write to it disappears) | NO           | NO   | NO         |
| PERFORMANCE_SCHEMA | YES     | Performance Schema                                             | NO           | NO   | NO         |
| MEMORY             | YES     | Hash based, stored in memory, useful for temporary tables      | NO           | NO   | NO         |
| ARCHIVE            | YES     | Archive storage engine                                         | NO           | NO   | NO         |
| MyISAM             | YES     | MyISAM storage engine                                          | NO           | NO   | NO         |
| FEDERATED          | NO      | Federated MySQL storage engine                                 | NULL         | NULL | NULL       |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
9 rows in set (0.00 sec)