Create Error state

dashboard/src/states/Error/Error.jsx

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+import {Stack, Typography, useMediaQuery, useTheme} from "@mui/material";
+import ServerDown from "@/common/assets/images/error/server_down.svg";
+
+export const Error = () => {
+    const theme = useTheme();
+    const isMobile = useMediaQuery(theme.breakpoints.down("lg"));
+
+    return (
+        <Stack direction="row" alignItems="center" justifyContent="center" sx={{height: "100vh"}} gap={5} p={3}>
+            <Stack direction="column" justifyContent="center" sx={{width: "30rem"}} gap={2}>
+                <Typography variant="h2" fontWeight={700}>Oh no..</Typography>
+                <Typography variant="h4" fontWeight={500}>The backend is currently not reachable.</Typography>
+
+                <Typography variant="h5" fontWeight={500}>
+                    This page will reload automatically once the backend is reachable again.
+                </Typography>
+            </Stack>
+
+            {!isMobile && <img src={ServerDown} alt="Server down" height={350}/>}
+        </Stack>
+    )
+}

dashboard/src/states/Error/index.js

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+export {Error as default} from "./Error.jsx";