diff --git a/homeassistant/components/ista_ecotrend/config_flow.py b/homeassistant/components/ista_ecotrend/config_flow.py
index b91f10eabdc..15222995a37 100644
--- a/homeassistant/components/ista_ecotrend/config_flow.py
+++ b/homeassistant/components/ista_ecotrend/config_flow.py
@@ -109,7 +109,7 @@ class IstaConfigFlow(ConfigFlow, domain=DOMAIN):
             )
             try:
                 await self.hass.async_add_executor_job(ista.login)
-            except (ServerError, InternalServerError):
+            except ServerError:
                 errors["base"] = "cannot_connect"
             except (LoginError, KeycloakError):
                 errors["base"] = "invalid_auth"