diff --git a/lbry/extras/daemon/daemon.py b/lbry/extras/daemon/daemon.py
index d40db5698..212411188 100644
--- a/lbry/extras/daemon/daemon.py
+++ b/lbry/extras/daemon/daemon.py
@@ -4150,7 +4150,7 @@ class Daemon(metaclass=JSONRPCServerType):
         wallet = self.wallet_manager.get_wallet_or_default(wallet_id)
 
         if claim_id:
-            txo = await self.ledger.get_claim_by_claim_id(wallet.accounts, claim_id)
+            txo = await self.ledger.get_claim_by_claim_id(claim_id, wallet.accounts)
             if not isinstance(txo, Output) or not txo.is_claim:
                 # TODO: use error from lbry.error
                 raise Exception(f"Could not find collection with claim_id '{claim_id}'.")
diff --git a/lbry/wallet/ledger.py b/lbry/wallet/ledger.py
index d671b1e2a..9583c22a7 100644
--- a/lbry/wallet/ledger.py
+++ b/lbry/wallet/ledger.py
@@ -556,7 +556,7 @@ class Ledger(metaclass=LedgerRegistry):
             log.info("Sync finished for address %s: %d/%d", address, len(pending_synced_history), len(to_request))
 
             assert len(pending_synced_history) == len(remote_history), \
-                f"{len(pending_synced_history)} vs {len(remote_history)}"
+                f"{len(pending_synced_history)} vs {len(remote_history)} for {address}"
             synced_history = ""
             for remote_i, i in zip(range(len(remote_history)), sorted(pending_synced_history.keys())):
                 assert i == remote_i, f"{i} vs {remote_i}"
diff --git a/lbry/wallet/network.py b/lbry/wallet/network.py
index 0898d7e67..5f796bef5 100644
--- a/lbry/wallet/network.py
+++ b/lbry/wallet/network.py
@@ -238,7 +238,7 @@ class Network:
                 log.exception("error looking up dns for spv server %s:%i", server, port)
 
         # accumulate the dns results
-        if self.config['explicit_servers']:
+        if self.config.get('explicit_servers', []):
             hubs = self.config['explicit_servers']
         elif self.known_hubs:
             hubs = self.known_hubs
@@ -254,7 +254,7 @@ class Network:
         sent_ping_timestamps = {}
         _, ip_to_hostnames = await self.resolve_spv_dns()
         n = len(ip_to_hostnames)
-        log.info("%i possible spv servers to try (%i urls in config)", n, len(self.config['explicit_servers']))
+        log.info("%i possible spv servers to try (%i urls in config)", n, len(self.config.get('explicit_servers', [])))
         pongs = {}
         known_hubs = self.known_hubs
         try:
@@ -299,8 +299,8 @@ class Network:
             if (pong is not None and self.jurisdiction is not None) and \
                     (pong.country_name != self.jurisdiction):
                 continue
-            client = ClientSession(network=self, server=(host, port), timeout=self.config['hub_timeout'],
-                                   concurrency=self.config['concurrent_hub_requests'])
+            client = ClientSession(network=self, server=(host, port), timeout=self.config.get('hub_timeout', 30),
+                                   concurrency=self.config.get('concurrent_hub_requests', 30))
             try:
                 await client.create_connection()
                 log.warning("Connected to spv server %s:%i", host, port)
diff --git a/lbry/wallet/server/leveldb.py b/lbry/wallet/server/leveldb.py
index d31e81eea..4132e8c33 100644
--- a/lbry/wallet/server/leveldb.py
+++ b/lbry/wallet/server/leveldb.py
@@ -660,7 +660,7 @@ class LevelDB:
         def get_counts():
             return tuple(
                 Prefixes.tx_count.unpack_value(packed_tx_count).tx_count
-                for packed_tx_count in self.db.iterator(prefix=Prefixes.tx_count.value, include_key=False)
+                for packed_tx_count in self.db.iterator(prefix=Prefixes.tx_count.prefix, include_key=False)
             )
 
         tx_counts = await asyncio.get_event_loop().run_in_executor(self.executor, get_counts)
@@ -1083,8 +1083,12 @@ class LevelDB:
             utxos = []
             utxo_append = utxos.append
             for (tx_hash, nout) in prevouts:
+                if tx_hash not in self.transaction_num_mapping:
+                    continue
                 tx_num = self.transaction_num_mapping[tx_hash]
                 hashX = self.db.get(Prefixes.hashX_utxo.pack_key(tx_hash[:4], tx_num, nout))
+                if not hashX:
+                    continue
                 utxo_value = self.db.get(Prefixes.utxo.pack_key(hashX, tx_num, nout))
                 if utxo_value:
                     utxo_append((hashX, Prefixes.utxo.unpack_value(utxo_value).amount))
diff --git a/tests/integration/blockchain/test_network.py b/tests/integration/blockchain/test_network.py
index 25092d6f5..3f757f14b 100644
--- a/tests/integration/blockchain/test_network.py
+++ b/tests/integration/blockchain/test_network.py
@@ -178,7 +178,7 @@ class UDPServerFailDiscoveryTest(AsyncioTestCase):
 class ServerPickingTestCase(AsyncioTestCase):
     async def _make_udp_server(self, port, latency) -> StatusServer:
         s = StatusServer()
-        await s.start(0, b'\x00' * 32, '127.0.0.1', port)
+        await s.start(0, b'\x00' * 32, 'US', '127.0.0.1', port, True)
         s.set_available()
         sendto = s._protocol.transport.sendto