diff --git a/backend/.gitignore b/backend/.gitignore
index e4986af..4197690 100644
--- a/backend/.gitignore
+++ b/backend/.gitignore
@@ -1,3 +1,4 @@
 target
 .env
 aulavirtual
+scraps
diff --git a/frontend/src/OnlineClassroom/index.tsx b/frontend/src/OnlineClassroom/index.tsx
index e06ad66..54827d0 100644
--- a/frontend/src/OnlineClassroom/index.tsx
+++ b/frontend/src/OnlineClassroom/index.tsx
@@ -5,6 +5,10 @@ import { FilledCard } from "../components/FilledCard";
 import { LinkIcon } from "../icons/LinkIcon";
 import { ClassroomUserCreation } from "./ClassroomUserCreation";
 import { ClassroomRegistrationUser } from "../types/ClassroomRegistrationUser";
+import { SpinnerGapIcon } from "../icons/SpinnerGapIcon";
+import { QuestionIcon } from "../icons/QuestionIcon";
+import { JsonResult } from "../types/JsonResult";
+import { XcircleIcon } from "../icons/XCircleIcon";
 
 type TabType = "Vinculate" | "Create";
 
@@ -54,19 +58,25 @@ function ClassroomUser(props: {person: Person}) {
     );
 }
 
+type Status = "Init" | "Ok" | "Loading" | "Error";
 function ClassroomVinculation(props: {person_surname: string}) {
     const [classroomUsers, setClassroomUsers] = createSignal<ClassroomRegistrationUser[]>([]);
+    const [error, setError] = createSignal("");
+    const [status, setStatus] = createSignal<Status>("Init");
 
     const loadUsers = async() => {
+        setStatus("Loading");
         const response = await fetch(`${import.meta.env.VITE_BACKEND_URL}/api/classroom/users/${encodeURIComponent(props.person_surname)}`);
-        const json = await response.json();
+        const json: JsonResult<Array<ClassroomRegistrationUser>> = await response.json();
 
         if (response.ok) {
-            setClassroomUsers(json);
+            setClassroomUsers(json.Ok);
+            setStatus("Ok");
         } else {
             console.error("Error loading users", json);
+            setError(json.Err.reason);
+            setStatus("Error");
         }
-
     };
 
     onMount(loadUsers);
@@ -76,32 +86,58 @@ function ClassroomVinculation(props: {person_surname: string}) {
             <p class="py-2 px-4">
                 Vincule un usuario existente:
             </p>
-            <For each={classroomUsers()}>
-                {(_) => <ClassroomSingleUser />}
-            </For>
+
+            <Show when={status() === "Loading"}>
+                <div class="text-center h-12 scale-150">
+                    <SpinnerGapIcon class="animate-spin" fill="var(--c-primary)" />
+                </div>
+            </Show>
+
+            <Show when={status() === "Ok"}>
+                <Show when={classroomUsers().length === 0}>
+                    <div class="px-4 pb-2">
+                        <div class="text-center pt-6 pb-4">
+                            <QuestionIcon class="scale-[200%]" fill="var(--c-outline)" />
+                        </div>
+                        <p>No se encontraron usuarios en el aula virtual.</p>
+                    </div>
+                </Show>
+                <For each={classroomUsers()}>
+                    {(u) => <ClassroomSingleUser user={u} />}
+                </For>
+            </Show>
+
+            <Show when={status() === "Error"}>
+                <div class="px-4 pb-2 text-c-error">
+                    <div class="text-center pt-6 pb-4">
+                        <XcircleIcon class="scale-[200%]" fill="var(--c-error)" />
+                    </div>
+                    <p>Error buscando usuarios: {error()}.</p>
+                </div>
+            </Show>
         </div>
     );
 }
 
 
 
-function ClassroomSingleUser() {
+function ClassroomSingleUser(props: {user: ClassroomRegistrationUser}) {
     return (
         <div
             class="hover:bg-c-surface-variant hover:text-c-on-surface-variant transition-colors
                     grid grid-cols-[auto_3rem] gap-4"
         >
             <div class="pl-4 py-2">
-                NOMBRE NOMBRE APELLIDO APELLIDO
+                {props.user.name} {props.user.surname}
                 <br />
                 <div class="grid grid-cols-[auto_10rem]">
                     <span class="font-mono">
-                    NNAPELLA
+                        {props.user.username}
                     </span>
                     <div>
                         registrado:&nbsp;
                         <span class="font-mono">
-                            26/05/2023
+                            ??/??/????
                         </span>
                     </div>
                 </div>
diff --git a/frontend/src/icons/QuestionIcon.tsx b/frontend/src/icons/QuestionIcon.tsx
new file mode 100644
index 0000000..1a1065f
--- /dev/null
+++ b/frontend/src/icons/QuestionIcon.tsx
@@ -0,0 +1,16 @@
+
+
+export function QuestionIcon(props: {fill: string, size?: number, class?: string}) {
+    return (
+        <svg
+            xmlns="http://www.w3.org/2000/svg"
+            class={`inline-block w-6 ${props.class}`}
+            width={props.size ?? 32}
+            height={props.size ?? 32}
+            fill={props.fill}
+            viewBox="0 0 256 256"
+        >
+            <path d="M140,180a12,12,0,1,1-12-12A12,12,0,0,1,140,180ZM128,72c-22.06,0-40,16.15-40,36v4a8,8,0,0,0,16,0v-4c0-11,10.77-20,24-20s24,9,24,20-10.77,20-24,20a8,8,0,0,0-8,8v8a8,8,0,0,0,16,0v-.72c18.24-3.35,32-17.9,32-35.28C168,88.15,150.06,72,128,72Zm104,56A104,104,0,1,1,128,24,104.11,104.11,0,0,1,232,128Zm-16,0a88,88,0,1,0-88,88A88.1,88.1,0,0,0,216,128Z" />
+        </svg>
+    );
+}
diff --git a/frontend/src/icons/SpinnerGapIcon.tsx b/frontend/src/icons/SpinnerGapIcon.tsx
new file mode 100644
index 0000000..ec70b45
--- /dev/null
+++ b/frontend/src/icons/SpinnerGapIcon.tsx
@@ -0,0 +1,16 @@
+
+
+export function SpinnerGapIcon(props: {fill: string, size?: number, class?: string}) {
+    return (
+        <svg
+            xmlns="http://www.w3.org/2000/svg"
+            class={`inline-block w-6 ${props.class}`}
+            width={props.size ?? 32}
+            height={props.size ?? 32}
+            fill={props.fill}
+            viewBox="0 0 256 256"
+        >
+            <path d="M136,32V64a8,8,0,0,1-16,0V32a8,8,0,0,1,16,0Zm37.25,58.75a8,8,0,0,0,5.66-2.35l22.63-22.62a8,8,0,0,0-11.32-11.32L167.6,77.09a8,8,0,0,0,5.65,13.66ZM224,120H192a8,8,0,0,0,0,16h32a8,8,0,0,0,0-16Zm-45.09,47.6a8,8,0,0,0-11.31,11.31l22.62,22.63a8,8,0,0,0,11.32-11.32ZM128,184a8,8,0,0,0-8,8v32a8,8,0,0,0,16,0V192A8,8,0,0,0,128,184ZM77.09,167.6,54.46,190.22a8,8,0,0,0,11.32,11.32L88.4,178.91A8,8,0,0,0,77.09,167.6ZM72,128a8,8,0,0,0-8-8H32a8,8,0,0,0,0,16H64A8,8,0,0,0,72,128ZM65.78,54.46A8,8,0,0,0,54.46,65.78L77.09,88.4A8,8,0,0,0,88.4,77.09Z" />
+        </svg>
+    );
+}
diff --git a/frontend/src/icons/XCircleIcon.tsx b/frontend/src/icons/XCircleIcon.tsx
new file mode 100644
index 0000000..16b264f
--- /dev/null
+++ b/frontend/src/icons/XCircleIcon.tsx
@@ -0,0 +1,16 @@
+
+
+export function XcircleIcon(props: {fill: string, size?: number, class?: string}) {
+    return (
+        <svg
+            xmlns="http://www.w3.org/2000/svg"
+            class={`inline-block w-6 ${props.class}`}
+            width={props.size ?? 32}
+            height={props.size ?? 32}
+            fill={props.fill}
+            viewBox="0 0 256 256"
+        >
+            <path d="M165.66,101.66,139.31,128l26.35,26.34a8,8,0,0,1-11.32,11.32L128,139.31l-26.34,26.35a8,8,0,0,1-11.32-11.32L116.69,128,90.34,101.66a8,8,0,0,1,11.32-11.32L128,116.69l26.34-26.35a8,8,0,0,1,11.32,11.32ZM232,128A104,104,0,1,1,128,24,104.11,104.11,0,0,1,232,128Zm-16,0a88,88,0,1,0-88,88A88.1,88.1,0,0,0,216,128Z" />
+        </svg>
+    );
+}
diff --git a/frontend/src/types/JsonResult.ts b/frontend/src/types/JsonResult.ts
new file mode 100644
index 0000000..553f6c5
--- /dev/null
+++ b/frontend/src/types/JsonResult.ts
@@ -0,0 +1,6 @@
+export type JsonResult<T> = {
+    Ok: T,
+    Err: {
+        reason: string
+    }
+};