Hi,
If you had this issue the easiest way to fix it, it’s to create again the tablewp_wpmailsmtp_tasks_meta. To do so, just export the table from php admin from other installation, remove the content of the table in the sql file and then import the sql file in the WP where the table wp_wpmailsmtp_tasks_meta was not created correctly.
This proceedure help me a lot to fix this issue, 5 minutes and you have plugin WP Mail SMTP up and running
I hope it helps