handle exceptions raised if trezor is not found

gui/qt/installwizard.py

@@ -421,7 +421,11 @@ class InstallWizard(QDialog):
                 wallet.add_master_public_key("remote/", xpub2)
 
             elif action == 'create_accounts':
-                wallet.create_accounts(password)
+                try:
+                    wallet.create_accounts(password)
+                except BaseException as e:
+                    QMessageBox.information(None, _('Error'), str(e), _('OK'))
+                    return
                 self.waiting_dialog(wallet.synchronize)
 
             elif action == 'create_cold_seed':

plugins/trezor.py

@@ -70,7 +70,11 @@ class Plugin(BasePlugin):
 
     def installwizard_restore(self, wizard, storage):
         wallet = TrezorWallet(storage)
-        wallet.create_accounts(None)
+        try:
+            wallet.create_accounts(None)
+        except BaseException as e:
+            QMessageBox.information(None, _('Error'), str(e), _('OK'))
+            return
         return wallet
 
     def send_tx(self, tx):