Membership module - all of a sudden does not allow people to register - ERROR: The username or passw

Hi

The membership module was working great

All of a sudden it does not allow people to register

When adding in new info it comes back as:

- ERROR: The username or password you entered is incorrect. Lost your password?

Downgraded to 3.4.6.1 version and still the same issue
-----------

For the last few days members and non members are having trouble registering it won't let them apply any email address so they can't purchase a program.

-----------------

I have added support access so you can have a look

Thanks and hope you can work out what went wrong with this plugin

James