修复服务访问控制页面可能空白的问题

internal/web/actions/default/servers/server/settings/access/index.go

@@ -36,6 +36,7 @@ func (this *IndexAction) RunGet(params struct {
 		allTypes = append(allTypes, def.Code)
 	}
 
+	if webConfig.Auth != nil {
 		var refs = webConfig.Auth.PolicyRefs
 		var realRefs = []*serverconfigs.HTTPAuthPolicyRef{}
 		for _, ref := range refs {
@@ -48,6 +49,7 @@ func (this *IndexAction) RunGet(params struct {
 			realRefs = append(realRefs, ref)
 		}
 		webConfig.Auth.PolicyRefs = realRefs
+	}
 
 	this.Data["authConfig"] = webConfig.Auth