Error Code: 2013. Lost connection to MySQL server during query (no replies)

Pulling my hair out with this one, very grateful if someone can help.

I am running a MySQL local server on the laptop which runs as a service in the background and using it to develop a SNOMED database. I have many tables and populated majority using the 'LOAD DATA INFILE' script. I am stuck a particular table where the .txt files are very large (>2mil rows) and as a result the query takes long to run, which is ok. Problem is after the 30 second mark, i keep getting following error:
"Error Code: 2013. Lost connection to MySQL server during query"

I have searched the depths of the ocean and set all GLOBAL VARIABLES that have 'timeout' in name to '1000' or more however error persists.

Some of the variables i have changed include:
'mysqlx_connect_timeout'
'mysqlx_idle_worker_thread_timeout'
'mysqlx_read_timeout''
'mysqlx_write_timeout'
'net_read_timeout'
'net_write_timeout'
'replica_net_timeout'
'slave_net_timeout'

Someone please help with this. Many many thanks in advance.