Loki Log Browser Slowness and does not allow us to search for a specific strings

Hi
We are using loki version 2.4.2 .and below is our loki config, we have observed that we are unable to use Log Browser, to search for a specific string.
Now run any other queries, however when we try to search for the string from loki dashabord , it works as expected.
Do we need to tweak any parameter from our side to use log browser as is .

auth_enabled: true

target: all,table-manager

server:
http_listen_port: 3100
grpc_server_max_recv_msg_size: 104857600
grpc_server_max_send_msg_size: 16777216

ingester:
lifecycler:
address: 127.0.0.1
ring:
kvstore:
store: inmemory
replication_factor: 1
final_sleep: 0s
chunk_idle_period: 5m
chunk_retain_period: 30s
max_chunk_age: 1h
chunk_target_size: 1048576
wal:
enabled: true
dir: /var/lib/loki/wal

query_scheduler:
max_outstanding_requests_per_tenant: 2048

query_range:
parallelise_shardable_queries: false

schema_config:
configs:

  • from: 2020-01-15
    store: cassandra
    object_store: cassandra
    schema: v11
    index:
    prefix: loki_index_
    period: 168h
    chunks:
    prefix: chunk_
    period: 168h

storage_config:
cassandra:
auth: true
username: loki_user
password: XXXXXXX
addresses: XXXXXXXXX
keyspace: loki
consistency: LOCAL_ONE

limits_config:
enforce_metric_name: false
reject_old_samples: true
reject_old_samples_max_age: 168h
max_query_lookback: 2352h

table_manager:
chunk_tables_provisioning:
inactive_read_throughput: 0
inactive_write_throughput: 0
provisioned_read_throughput: 0
provisioned_write_throughput: 0
index_tables_provisioning:
inactive_read_throughput: 0
inactive_write_throughput: 0
provisioned_read_throughput: 0
provisioned_write_throughput: 0
retention_deletes_enabled: true
retention_period: 2352h


This is the error we are getting.