Error when trying to update profile

In our Member Access area, under ‘My Profile’, when you make a change to your profile, you receive this error:

Error! Security check failed for membership level identifier validation.
The submitted membership level data does not match.
If you are using caching please empty the cache data and try again.
If you are using the Form Builder addon, please update the addon and try again.

We are running ver 4.5.9 of the main plugin and ver 4.6.3 of the Form builder.