diff --git a/internal/webserver/authentication/Authentication.go b/internal/webserver/authentication/Authentication.go
index d3534f0..4191497 100644
--- a/internal/webserver/authentication/Authentication.go
+++ b/internal/webserver/authentication/Authentication.go
@@ -169,9 +169,16 @@ func extractOauthGroups(userInfo OAuthUserClaims, groupScope string) ([]string,
 		return nil, fmt.Errorf("claim %s was not passed on", groupScope)
 	}
 
-	// Convert the interface{} to a []interface{} and then to []string
+	// Convert the interface{} to a []string
+	if groupsInterface == nil {
+		return []string{}, nil
+	}
+	groupsCast, ok := groupsInterface.([]any)
+	if !ok {
+		return nil, fmt.Errorf("scope %s is not an array", groupScope)
+	}
 	var groups []string
-	for _, group := range groupsInterface.([]interface{}) {
+	for _, group := range groupsCast {
 		groups = append(groups, group.(string))
 	}
 
diff --git a/internal/webserver/web/templates/html_error_auth.tmpl b/internal/webserver/web/templates/html_error_auth.tmpl
index 5d4de4b..d5b97a6 100644
--- a/internal/webserver/web/templates/html_error_auth.tmpl
+++ b/internal/webserver/web/templates/html_error_auth.tmpl
@@ -7,7 +7,7 @@
 		  <div class="card-body">
 		    <h2 class="card-title">Unauthorised user</h2>
 		    <br>
-		    <p class="card-text">Login with OAuth provider was sucessful, however this user is not authorised by Gokapi.</p><br><br>
+		    <p class="card-text">Login with OAuth provider was sucessful, however this user is not authorised to use Gokapi.</p><br><br>
 		    <a href="./login?consent=true" class="card-link">Log in as different user</a>
 		  </div>
 		</div>
diff --git a/makefile b/makefile
index 6b89bea..98d8a33 100644
--- a/makefile
+++ b/makefile
@@ -1,5 +1,6 @@
 GOPACKAGE=github.com/forceu/gokapi
 BUILD_FLAGS=-ldflags="-s -w -X '$(GOPACKAGE)/internal/environment.Builder=Make Script' -X '$(GOPACKAGE)/internal/environment.BuildTime=$(shell date)'"
+BUILD_FLAGS_DEBUG=-ldflags="-X '$(GOPACKAGE)/internal/environment.Builder=Make Script' -X '$(GOPACKAGE)/internal/environment.BuildTime=$(shell date)'"
 DOCKER_IMAGE_NAME=gokapi
 CONTAINER_TOOL ?= docker
 
@@ -16,6 +17,14 @@ build :
 	go generate ./...
 	CGO_ENABLED=0 go build $(BUILD_FLAGS) -o ./gokapi $(GOPACKAGE)/cmd/gokapi
 
+.PHONY: build-debug
+# Build Gokapi binary
+build-debug : 
+	@echo "Building binary with debug info..."
+	@echo
+	go generate ./...
+	CGO_ENABLED=0 go build $(BUILD_FLAGS_DEBUG) -o ./gokapi $(GOPACKAGE)/cmd/gokapi
+
 .PHONY: coverage
 coverage:
 	@echo Generating coverage