Thanks for the report
It seems to be a re-appearing problem with passwords storage protection against hijacking (copying). It is most likely caused by my avast component release which is independent on Avast major releases, but we are still investigating the root cause of the issue so it is still a bit soon to blame some component.
Once we find root cause we will deliver fix ASAP no matter where it is.
Please note that if you are affected by this issue no changes you think you’ve made on data in your passwords are saved and there is no common way how to solve the issue so re-install, repair etc. nothing will help.
If you really need to fix the issue ping me PM I will provide a set of steps which will solve the issue (these are very technical and bit destructive so I don’t want to make them public).
In general, you should delete local avast passwords storage, create a new one (empty), turn on synchronization and authorize the device from another device or from the backup link.
We are sorry for any inconvenience caused by this issue. We are doing our best to fix it ASAP.