Related to #11936
Reported on the forum: https://forum.matomo.org/t/warnings-after-password-change/294754

I am getting this error when changing the password and logging in the first time.
Matomo-Version: 3.5.1
MySQL-Version: 5.5.56-MariaDB
PHP-Version: 7.2.8
Redis Plugin
After loging in a second time it is gone.

Since our customers are using Matomo, this Warning is not very pretty
Any way to disable the warnings?

Also, like the message wanted, it has been reported :)

I haven't seen this warnings when using PHP7.2, but as Quickform2 hasn't been updated in 4 years it's possible it is using deprecated features.