This has happened to me over and over again when using the Chrome extension. I can’t tell if I’m doing something wrong or if something just isn’t right with the extension. I have one web site I frequent where I am forced to change my password regularly (although this issue has happened across multiple sites). I open the Login item in Bitwarden and click Edit to edit it, but when I make the changes and click Save, it gives me an error and logs me out of Bitwarden altogether. I have to re-login to Bitwarden, then repeat the steps again, View, Edit, Save, and then it always saves OK the 2nd time.