Running a query shows error on AWS Redshift "Queries" dashboard

I have to run a query to copy data from s3 to redshift. Total size of the data to copy 110GB Query runs fine for 1-2hr after that i see this error

There was an error retrieving the details for this query: Invalid Input. Expected Input: Load Id NOT_NULL, Load Status NOT_NULL


copy prod_data from 's3://my-buckets/prod-data/'  
access_key_id ''
secret_access_key ''
region 'eu-central-1'
delimiter ','
MAXERROR 100000;

Error snapshot: enter image description here

Please suggest how can i solve this issue.