diff --git a/resolvers/load.py b/resolvers/load.py
index ed73ac0..4206c4b 100644
--- a/resolvers/load.py
+++ b/resolvers/load.py
@@ -75,13 +75,13 @@ async def load_chats(
     chats = []
     try:
         if author_id:
-            logger.debug("got author", author_id)
+            logger.debug(f"got author {author_id}")
             cids = await redis.execute("SMEMBERS", f"chats_by_author/{author_id}")
-            logger.debug("got cids", cids)
+            logger.debug(f"got cids {cids}")
             members_online = (
                 await redis.execute("SMEMBERS", "authors-online")
             ) or []  # to show online status
-            logger.debug("members online", members_online)
+            logger.debug(f"members online: {members_online}")
             if isinstance(cids, set):
                 # TODO: add sort by chat.created_at with in-memory caching chats service
                 cids = list(cids)[offset : (offset + limit)]
@@ -89,9 +89,11 @@ async def load_chats(
                 if len(cids) == 0:
                     logger.debug(f"no chats for user with id={author_id}")
                     r = await create_chat(None, info, members=[2])  # member with id = 2 is discours
-                    if isinstance(r, dict) and "chat" in r:
-                        logger.debug(f"created chat: {r['chat']['id']}")
-                        cids.append(r["chat"]["id"])
+                    if isinstance(r, dict) and "chat" in r and isinstance(r['chat'], dict):
+                        chat_id = r['chat'].get('id')
+                        if chat_id:
+                            logger.debug(f"created chat: {chat_id}")
+                            cids.append(chat_id)
 
                 logger.debug(f"getting data for {len(cids)} user's chats")
                 for cid in cids:
diff --git a/services/core.py b/services/core.py
index f6ad00f..77c94b1 100644
--- a/services/core.py
+++ b/services/core.py
@@ -64,8 +64,8 @@ class CacheStorage:
         self = CacheStorage
         async with self.lock:
             result = get_all_authors()
-            logger.info(f"cache loaded {len(result)}")
-            if result:
+            if isinstance(result, list):
+                logger.info(f"cache loaded {len(result)}")
                 CacheStorage.authors = result
                 for a in result:
                     user_id = a.get("user")