diff --git a/cmd/serv.go b/cmd/serv.go
index d2271b68d2..39b351fbcc 100644
--- a/cmd/serv.go
+++ b/cmd/serv.go
@@ -104,7 +104,9 @@ func fail(ctx context.Context, userMessage, logMsgFmt string, args ...any) error
 	// There appears to be a chance to cause a zombie process and failure to read the Exit status
 	// if nothing is outputted on stdout.
 	_, _ = fmt.Fprintln(os.Stdout, "")
-	_, _ = fmt.Fprintln(os.Stderr, "Gitea:", userMessage)
+	_, _ = fmt.Fprintln(os.Stderr, "error:")
+	_, _ = fmt.Fprintln(os.Stderr, "error:", userMessage)
+	_, _ = fmt.Fprintln(os.Stderr, "error:")
 
 	if logMsgFmt != "" {
 		logMsg := fmt.Sprintf(logMsgFmt, args...)
diff --git a/routers/private/hook_proc_receive.go b/routers/private/hook_proc_receive.go
index efb3f5831e..991a2dd7da 100644
--- a/routers/private/hook_proc_receive.go
+++ b/routers/private/hook_proc_receive.go
@@ -4,9 +4,12 @@
 package private
 
 import (
+	"errors"
 	"net/http"
 
+	issues_model "code.gitea.io/gitea/models/issues"
 	repo_model "code.gitea.io/gitea/models/repo"
+	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/private"
@@ -27,6 +30,14 @@ func HookProcReceive(ctx *gitea_context.PrivateContext) {
 	if err != nil {
 		if repo_model.IsErrUserDoesNotHaveAccessToRepo(err) {
 			ctx.Error(http.StatusBadRequest, "UserDoesNotHaveAccessToRepo", err.Error())
+		} else if errors.Is(err, issues_model.ErrMustCollaborator) {
+			ctx.JSON(http.StatusUnauthorized, private.Response{
+				Err: err.Error(), UserMsg: "You must be a collaborator to submit a pull request",
+			})
+		} else if errors.Is(err, user_model.ErrBlockedUser) {
+			ctx.JSON(http.StatusUnauthorized, private.Response{
+				Err: err.Error(), UserMsg: "You have been blocked by repository owner",
+			})
 		} else {
 			log.Error(err.Error())
 			ctx.JSON(http.StatusInternalServerError, private.Response{