octobercms - array to string conversion error in $this->encrypter->encrypt

Question

Whenever I try to log into https://mywebsite.com/backend/backend/auth/signin I get the following error:

I don't get that error when I was a username that doesn't exist nor do I get that error when I use a bad password for a user that doesn't exist - I only get that error when I login with a valid username / password combo.

From what I've been able to determine the error is happening when OctoberCMS is prepping the response to my successful login attempt. It's trying to set the cookies, including admin_auth. The problem with admin_auth is that OctoberCMS is setting it to an array:

array(2) {
  [0]=>
  int(2)
  [1]=>
  string(60) "$2y$10$eMtuod9M2j5L99MPSMYo3eaFgW4dfvmJ0KSY9RXhQMd0w1klrwqEm"
}

question from:https://stackoverflow.com/questions/65853879/array-to-string-conversion-error-in-this-encrypter-encrypt

Answer 1

Update to October CMS v1.1 via composer and your problems will go away ;)