Failed to configure a DataSource: ‘url’ attribute is not specified

Error Description:

Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.
Reason: Failed to determine a suitable driver class

Solution

Consider the following:
If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).
Quick Solution: Add manual MySQL dependencies
First, remove the existing mysql dependency.
<dependency>
   <groupId>com.mysql</groupId>
   <artifactId>mysql-connector-j</artifactId>
   <scope>runtime</scope>
  </dependency>

Add new MySQL dependency

<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.33</version>
</dependency>

Note: Please make sure, <version> should be specified into added dependency this is the only difference between them. Next, Quick update the maven and rerun the application.