try to get development build going.

app/i18n/api.ts

@@ -28,20 +28,29 @@ export class Translator {
     }
 
     async fetchLanguages() : Promise<language_matrix> {
+        let data  = {};
         const res = await fetch(this.baseUrl + "/languages", {
             headers: {
                 "Content-Type": "application/json"
             }
         });
-        const data = await res.json();
-        return Object.fromEntries(
-            Object.values(data as language_matrix_entry []).map((obj : language_matrix_entry) => {
-                return [
-                    obj["code"],
-                    obj,
-                ]
-            })
-        )
+        try {
+            data = await res.json();
+        } catch (e) {
+            throw new Error(`Parsing data from ${await res.text()}: ${e}`)
+        }
+        try {
+            return Object.fromEntries(
+                Object.values(data as language_matrix_entry []).map((obj : language_matrix_entry) => {
+                    return [
+                        obj["code"],
+                        obj,
+                    ]
+                })
+            )
+        } catch(e) {
+            throw new Error(`Can't extract values from data: ${JSON.stringify(data)}`)
+        }
     }
 
     async translate(text : string, target : string|undefined = undefined) {