diff --git a/api/v3/TwingleDonation/Cancel.php b/api/v3/TwingleDonation/Cancel.php
index d2bba26..e3dee49 100644
--- a/api/v3/TwingleDonation/Cancel.php
+++ b/api/v3/TwingleDonation/Cancel.php
@@ -150,7 +150,7 @@ function civicrm_api3_twingle_donation_Cancel($params) {
 
     $result = civicrm_api3_create_success($contribution);
   }
-  catch (CiviCRM_API3_Exception $exception) {
+  catch (Exception $exception) {
     $result = civicrm_api3_create_error($exception->getMessage());
   }
 
diff --git a/api/v3/TwingleDonation/Endrecurring.php b/api/v3/TwingleDonation/Endrecurring.php
index 318b115..12c93c4 100644
--- a/api/v3/TwingleDonation/Endrecurring.php
+++ b/api/v3/TwingleDonation/Endrecurring.php
@@ -139,7 +139,7 @@ function civicrm_api3_twingle_donation_endrecurring($params) {
 
     $result = civicrm_api3_create_success($contribution);
   }
-  catch (CiviCRM_API3_Exception $exception) {
+  catch (Exception $exception) {
     $result = civicrm_api3_create_error($exception->getMessage());
   }
 
diff --git a/api/v3/TwingleDonation/Submit.php b/api/v3/TwingleDonation/Submit.php
index 5856996..a0dc342 100644
--- a/api/v3/TwingleDonation/Submit.php
+++ b/api/v3/TwingleDonation/Submit.php
@@ -727,14 +727,16 @@ function civicrm_api3_twingle_donation_Submit($params) {
         } catch (Exception $ex) {
           // TODO: more error handling?
           Civi::log()->debug("Twingle membership postprocessing call {$pp_entity}.{$pp_action} has failed: " . $ex->getMessage());
+            throw new Exception(
+                E::ts("Twingle membership postprocessing call has failed, see log for more information")
+            );
         }
       }
-
     }
 
     $result = civicrm_api3_create_success($result_values);
   }
-  catch (CiviCRM_API3_Exception $exception) {
+  catch (Exception $exception) {
     $result = civicrm_api3_create_error($exception->getMessage());
   }