diff --git a/src/components/views/settings/AddRemoveThreepids.tsx b/src/components/views/settings/AddRemoveThreepids.tsx
index 242afd272c0..236735e223e 100644
--- a/src/components/views/settings/AddRemoveThreepids.tsx
+++ b/src/components/views/settings/AddRemoveThreepids.tsx
@@ -355,6 +355,28 @@ const AddThreepidSection: React.FC<{ medium: "email" | "msisdn"; disabled?: bool
                                     : _t("settings|general|error_msisdn_verification"),
                             description: _t("settings|general|email_verification_instructions"),
                         });
+                    } else if (
+                        underlyingError instanceof MatrixError &&
+                        underlyingError.errcode === "M_SESSION_EXPIRED"
+                    ) {
+                        Modal.createDialog(ErrorDialog, {
+                            title: _t("settings|general|error_3pid_session_expired"),
+                            description: _t("settings|general|session_expired_instructions"),
+                        });
+                    } else if (
+                        underlyingError instanceof MatrixError &&
+                        underlyingError.errcode === "M_TOKEN_INCORRECT"
+                    ) {
+                        Modal.createDialog(ErrorDialog, {
+                            title:
+                                medium === "email"
+                                    ? _t("settings|general|token_incorrect_header")
+                                    : _t("settings|general|token_incorrect_header"),
+                            description:
+                                medium === "msisdn"
+                                    ? _t("settings|general|msisdn_token_incorrect_body")
+                                    : _t("invite|failed_generic"),
+                        });
                     } else {
                         Modal.createDialog(ErrorDialog, {
                             title:
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 889fc157e9e..5d930bab7a0 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -2526,6 +2526,7 @@
             "email_not_verified": "Your email address hasn't been verified yet",
             "email_verification_instructions": "Click the link in the email you received to verify and then click continue again.",
             "emails_heading": "Email addresses",
+            "error_3pid_session_expired": "Token Expired",
             "error_add_email": "Unable to add email address",
             "error_deactivate_communication": "There was a problem communicating with the server. Please try again.",
             "error_deactivate_invalid_auth": "Server did not return valid authentication information.",
@@ -2548,6 +2549,7 @@
             "language_section": "Language",
             "msisdn_in_use": "This phone number is already in use",
             "msisdn_label": "Phone Number",
+            "msisdn_token_incorrect_body": "The token you entered does not match.",
             "msisdn_verification_field_label": "Verification code",
             "msisdn_verification_instructions": "Please enter verification code sent via text.",
             "msisdns_heading": "Phone numbers",
@@ -2560,7 +2562,9 @@
             "profile_subtitle_oidc": "Your account is managed separately by an identity provider and so some of your personal information can’t be changed here.",
             "remove_email_prompt": "Remove %(email)s?",
             "remove_msisdn_prompt": "Remove %(phone)s?",
+            "session_expired_instructions": "This token has expired: request a new token to continue.",
             "spell_check_locale_placeholder": "Choose a locale",
+            "token_incorrect_header": "Token incorrect",
             "unable_to_load_emails": "Unable to load email addresses",
             "unable_to_load_msisdns": "Unable to load phone numbers",
             "username": "Username"