How to fetch the value of a text type Project Field or Profield in JIRA

[SWAPNIL SRIVASTAV]

How to fetch the value of a text type Project Field or Profield in JIRA using groovy scripted Escalation Services of Script Runner. I have tried this script but it gives a Static type check error at the last line "Cannot find matching method". Neither the last line works not the second last (the one which is commented). Kindly help

import com.atlassian.jira.component.ComponentAccessor
import com.deiser.jira.profields.api.field.FieldService
import com.deiser.jira.profields.api.field.Field
import com.deiser.jira.profields.api.value.ValueService
import com.onresolve.scriptrunner.runner.customisers.WithPlugin

@WithPlugin("com.deiser.jira.profields")

def projectKey = "XXXX"

def valueService = ComponentAccessor.getOSGiComponentInstanceOfType(ValueService.class)
def fieldService = ComponentAccessor.getOSGiComponentInstanceOfType(FieldService.class)

def project = ComponentAccessor.getProjectManager().getProjectByCurrentKey(projectKey);
log.error "Project name: " + project.name

def CustomerFieldID = 1;
Field appManager = fieldService.get(CustomerFieldID);
//def appManagerValue = valueService.getValue(project, appManager).toString();
def appManagerValue = appManager.getValueInProject(project)