Double quotes not recognized by WorkItemHandler

I am following this link to create a custom work item for MSSQL database connection and I am able to generate work item maven project and deploy work item repository into wildfly server successfully.
jBPM Link: http://mswiderski.blogspot.com/2018/04/jbpm-work-items-are-really-simple.html

When I go to Service Repository to access a list of work items, it shows blank and throws an exception. Refer to Error.log file.
File: ServiceRepository.jpg, ServiceRepository2.jpg, Error.log

MsDatabaseWorkItemHandler.java Source:
======================================
@Wid(widfile="MSQLService.wid", name="MSQLService",
displayName="Database Service Task",
defaultHandler="mvel: new com.maventree.workitem.msdatabase.MsDatabaseWorkItemHandler(\"${db.host}\", \"${db.userName}\", \"${db.userPassword}\")",
category = "maven-xw-workitem",
icon = "defaultservicenodeicon.png",
parameters=

{ @WidParameter(name="DbHost", required = true), @WidParameter(name="DbUser", required = true), @WidParameter(name="DbPassword", required = true), @WidParameter(name="SqlQuery", required = true) }

,
results =

{ @WidResult(name = "QueryResult", runtimeType = "java.util.List") }

,
mavenDepends = {
@WidMavenDepends(group = "${groupId}", artifact = "${artifactId}", version = "${version}")
},
serviceInfo = @WidService(category = "${name}", description = "${description}",
keywords = "database",
action = @WidAction(title = "Database Service Task")
)
)
public class MsDatabaseWorkItemHandler extends AbstractLogOrThrowWorkItemHandler

pom.xml Source:
===============
<properties>
<db.host>jdbc:sqlserver://localhost:1433;databaseName=user;</db.host>
<db.userName>user</db.userName>
<db.userPassword>password</db.userPassword>
</properties>

When I modify JDBC URL by removing ":" colon character from parameter as below, everything is working fine. Please help. Thank you.

pom.xml Source:
===============
<properties>
<db.host>jdbcsqlserver//localhost1433;databaseName=user;</db.host>
<db.userName>user</db.userName>
<db.userPassword>password</db.userPassword>
</properties>