fix

src/components/Widgets/Classroom/UserClassroomCard/UserClassroomCard.vue

@@ -27,7 +27,8 @@
                   class="material-icons-outlined" />
           {{ this.getRegistrationStatusTitle(registration) }}
         </div>
-        <div class="financial-status-box">
+        <div v-if="registration.invoice_info"
+             class="financial-status-box">
           <q-icon name="credit_card"
                   class="material-icons-outlined" />
           {{ this.getInvoiceStatusTitle(registration.invoice_info.status) }}