database db.simple doesn't exist

[computadorescol]

hi Jonathan,
good post .. I instaled simple and it was ok but in part3 ..this error is coming, could you please review it and tell me why in db doenst appear the table..thanks in advance..
Base table or view not found: 1146 Table 'db.simple' doesn't exist: SELECT COUNT(*) AS expression FROM (SELECT 1 AS expression FROM {simple} base_table) subquery; Array ( ) in Drupal\Core\Entity\EntityListBuilder->getEntityIds() (line 104 of core/lib/Drupal/Core/Entity/EntityListBuilder.php)

this error occurs after instaling the module and after clear cache and reload when click on simple entity list button on content menu.
on using ddev as local environment.
ubuntu 18.04
Drupal Version 8.9.0
5.5.5-10.2.34-MariaDB-1:10.2.34+maria~bionic-log
in settings.ddev.php is host = "db";
$port = 3306;
development.services,yml is services:
cache.backend.null:
class: Drupal\Core\Cache\NullBackendFactory
I check the database and the tables are not present.