show a better message when admission to an onboarding meeting succeeds but registration fails

src/components/MembersList.vue

@@ -392,39 +392,44 @@ export default class MembersList extends Vue {
           did: member.did,
           name: member.name,
         }
-        const result = await register(
-          this.activeDid,
-          this.apiServer,
-          this.axios,
-          contactOldOrNew,
-        );
-        if (result.success) {
-          member.member.registered = true;
-          if (oldContact) {
-            await db.contacts.update(member.did, { registered: true });
-            oldContact.registered = true;
-          }
-          this.$notify(
-            {
-              group: "alert",
-              type: "success",
-              title: "Registered",
-              text: "Besides being admitted, they were also registered.",
-            },
-            3000,
+        try {
+          const result = await register(
+            this.activeDid,
+            this.apiServer,
+            this.axios,
+            contactOldOrNew,
           );
-        } else {
-          const additionalInfo = result.error || "";
+          if (result.success) {
+            member.member.registered = true;
+            if (oldContact) {
+              await db.contacts.update(member.did, { registered: true });
+              oldContact.registered = true;
+            }
+            this.$notify(
+              {
+                group: "alert",
+                type: "success",
+                title: "Registered",
+                text: "Besides being admitted, they were also registered.",
+              },
+              3000,
+            );
+          } else {
+            throw result;
+          }
+        // eslint-disable-next-line @typescript-eslint/no-explicit-any
+        } catch (error: any) {
+          // registration failure is likely explained by a message from the server
+          const additionalInfo = serverMessageForUser(error) || error?.error || "";
           this.$notify(
             {
               group: "alert",
-              type: "danger",
+              type: "warning",
               title: "Registration failed",
-              text:
-                "They were admitted, but registration failed. You can try again, or register from your contacts screen. " +
+              text: "They were admitted to the meeting. However, registration failed. You can register them from the contacts screen. " +
                 additionalInfo,
             },
-            10000,
+            12000,
           );
         }
       }