fixes

src/main/java/stirling/software/SPDF/SPdfApplication.java

@@ -10,6 +10,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.Properties;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
@@ -40,7 +41,7 @@ public class SPdfApplication {
     private String baseUrl;
 
     public SPdfApplication(
-            Environment env, ApplicationProperties applicationProperties, WebBrowser webBrowser) {
+            Environment env, ApplicationProperties applicationProperties, @Autowired(required = false) WebBrowser webBrowser) {
         this.env = env;
         this.applicationProperties = applicationProperties;
         this.webBrowser = webBrowser;

src/main/java/stirling/software/SPDF/config/AppUpdateService.java

@@ -1,5 +1,6 @@
 package stirling.software.SPDF.config;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Service;
@@ -15,7 +16,7 @@ class AppUpdateService {
     private final ShowAdminInterface showAdmin;
 
     public AppUpdateService(
-            ApplicationProperties applicationProperties, ShowAdminInterface showAdmin) {
+            ApplicationProperties applicationProperties, @Autowired(required = false) ShowAdminInterface showAdmin) {
         this.applicationProperties = applicationProperties;
         this.showAdmin = showAdmin;
     }

src/main/java/stirling/software/SPDF/controller/api/pipeline/ApiDocService.java

@@ -7,6 +7,7 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
@@ -34,7 +35,7 @@ public class ApiDocService {
     Map<String, List<String>> outputToFileTypes = new HashMap<>();
     JsonNode apiDocsJsonRootNode;
 
-    public ApiDocService(ServletContext servletContext, UserServiceInterface userService) {
+    public ApiDocService(ServletContext servletContext, @Autowired(required = false) UserServiceInterface userService) {
         this.servletContext = servletContext;
         this.userService = userService;
     }

src/main/java/stirling/software/SPDF/controller/api/pipeline/PipelineProcessor.java

@@ -15,6 +15,7 @@ import java.util.stream.Collectors;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.io.ByteArrayResource;
 import org.springframework.core.io.Resource;
 import org.springframework.http.*;
@@ -46,7 +47,7 @@ public class PipelineProcessor {
 
     public PipelineProcessor(
             ApiDocService apiDocService,
-            UserServiceInterface userService,
+            @Autowired(required = false) UserServiceInterface userService,
             ServletContext servletContext) {
         this.apiDocService = apiDocService;
         this.userService = userService;

src/main/java/stirling/software/SPDF/controller/web/GeneralWebController.java

@@ -10,6 +10,7 @@ import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceLoader;
 import org.springframework.core.io.support.ResourcePatternUtils;
@@ -36,7 +37,7 @@ public class GeneralWebController {
     private static final String SIGNATURE_BASE_PATH = "customFiles/static/signatures/";
     private static final String ALL_USERS_FOLDER = "ALL_USERS";
     private final SignatureService signatureService;
-    private final UserServiceInterface userService;
+    private final @Autowired(required = false) UserServiceInterface userService;
     private final ResourceLoader resourceLoader;
 
     public GeneralWebController(

src/main/java/stirling/software/SPDF/controller/web/SignatureController.java

@@ -2,6 +2,7 @@ package stirling.software.SPDF.controller.web;
 
 import java.io.IOException;
 
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
@@ -19,7 +20,7 @@ public class SignatureController {
 
     private final SignatureService signatureService;
 
-    private final UserServiceInterface userService;
+    private final @Autowired(required = false) UserServiceInterface userService;
 
     public SignatureController(
             SignatureService signatureService, UserServiceInterface userService) {

src/test/java/stirling/software/SPDF/SPdfApplicationTest.java

@@ -15,6 +15,7 @@ import org.mockito.Mock;
 import org.mockito.junit.jupiter.MockitoExtension;
 import org.springframework.core.env.Environment;
 
+import stirling.software.SPDF.UI.WebBrowser;
 import stirling.software.SPDF.model.ApplicationProperties;
 
 @ExtendWith(MockitoExtension.class)
@@ -25,13 +26,12 @@ public class SPdfApplicationTest {
 
     @Mock
     private ApplicationProperties applicationProperties;
-
+    
     @InjectMocks
     private SPdfApplication sPdfApplication;
 
     @BeforeEach
     public void setUp() {
-        sPdfApplication = new SPdfApplication(env, applicationProperties, null);
         sPdfApplication.setServerPortStatic("8080");
     }