PostgresSQL Driver Exception at start up for a Java application with Spring And Jooq

I would create a java backend application using spring framework and jooq library and maven as a build tool.
I solved some problem with jooq and, now, generate correctly the classes, but the application fails at startup with the below error on postgresql driver.

The error is this:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: org.postgresql.Driver
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is java.lang.IllegalStateException: Cannot load driver class: org.postgresql.Driver
Caused by: java.lang.IllegalStateException: Cannot load driver class: org.postgresql.Driver

the pom.xml is this:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>....</groupId>
    <artifactId>....</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>....</name>
    <description>....</description>

    <properties>
        <java.version>1.8</java.version>
        <org.jooq.version>3.13.2</org.jooq.version>
        <lifecycle-mapping.version>1.0.0</lifecycle-mapping.version>
        <sql-maven-plugin.version>1.5</sql-maven-plugin.version>
        <properties-maven-plugin.version>1.0.0</properties-maven-plugin.version>
        <start-class>.....</start-class>
    </properties>

    <dependencies>

        <!-- base dependency -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jooq</artifactId>
        </dependency>

        <!-- postgreSQL and jooq -->
        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq</artifactId>
            <version>3.13.2</version>
        </dependency>
        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq-meta</artifactId>
            <version>3.13.2</version>
        </dependency>
        <dependency>
            <groupId>org.jooq</groupId>
            <artifactId>jooq-codegen</artifactId>
            <version>3.13.2</version>
        </dependency>


        <!--test -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>


            <plugin>
                <groupId>org.jooq</groupId>
                <artifactId>jooq-codegen-maven</artifactId>
                <version>${org.jooq.version}</version>

                <dependencies>
                    <dependency>
                        <groupId>org.postgresql</groupId>
                        <artifactId>postgresql</artifactId>
                        <version>42.2.8</version>
                    </dependency>
                </dependencies>

                <configuration>
                    <jdbc>
                        <driver>org.postgresql.Driver</driver>
                        <url>jdbc:postgresql:db</url>
                        <user>...</user>
                        <password>...</password>
                    </jdbc>

                    <generator>
                        <database>
                            <name>org.jooq.meta.postgres.PostgresDatabase</name>
                            <includes>.*</includes>
                            <excludes></excludes>
                            <inputSchema>public</inputSchema>
                        </database>
                        <target>
                            <packageName>...</packageName>
                            <directory>src/main/java</directory>
                        </target>
                    </generator>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

My application.properties is this:

spring.datasource.driver-class-name=org.postgresql.Driver
spring.datasource.url=jdbc:postgresql://localhost:5432/db
spring.datasource.username=...
spring.datasource.password=...

I will be immensely grateful for all the support on this error and jooq configuration.