Fix: only log errors directly if exist

src/pages/api/services/proxy.js

@@ -71,8 +71,8 @@ export default async function handler(req, res) {
 
     logger.debug("Unknown proxy service type: %s", type);
     return res.status(403).json({ error: "Unkown proxy service type" });
-  } catch (ex) {
-    logger.error(ex);
+  } catch (e) {
+    if (e) logger.error(e);
     return res.status(500).send({ error: "Unexpected error" });
   }
 }