phpredis session problem

#1
i seem to get
Unknown: Failed to write session data (redis). Please verify that the current setting of session.save_path is correct (tcp://127.0.0.1:6379)

ever since i installed phpredis using apt-get install lsphp72-redis
https://github.com/phpredis/phpredis/issues/1411
my php.ini
Code:
session.save_handler = redis
session.save_path = "tcp://127.0.0.1:6379"
Code:
PHP Version 7.2.11-3+xenial
not sure what it is, how should i revert back to phpredis 4.0.2

cheers
 
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