Corrupted dump file, deprecation warning

I have a site that gets a deprecation warning when I enter the admin. Attempting to migrate this site to my local test system creates an unusable backup file.

The sql.gz file is not recognized as a valid gzip file and the unzipped version includes the warning in html at the beginning of the file, so it gets a sql error when attempting to load the database.

Removing the deprecation warning from the sql file fixes the problem.

https://ww.wp.xz.cn/plugins/wp-migrate-db/