Hey there,
I am really sorry for the delay in this reply as it was the weekend for us here.
Normally you hit this
mySQL server has gone away error during importing data from your database is that
happens when the imported data is too large or the connection with the MySQL server disconnects/timeouts.
You can read this reference link:
https://stackoverflow.com/questions/12425287/mysql-server-has-gone-away-when-importing-large-sql-file
Perhaps you can try to set
max_allowed_packet to a higher value from your database my.cnf file and then try to reimport again your data into your database? ( you might need to remove those imported table before you reimport again)
Because of the above other errors you showed us that it seems like the import data process is not complete yet and some of the tables are not fully imported.