MySQL throws an error.

[ghost]

Error
SQL query:

ALTER TABLE auth_tokens
ADD CONSTRAINT auth_tokens_ibfk_1 FOREIGN KEY (user_id) REFERENCES users (user_id) ON DELETE CASCADE
MySQL said: Documentation

#1215 - Cannot add foreign key constraint

[djraw]

I came across the same today. I use a prefix for the database, as I use one DB for 3 roundcubes.

The issue is, that there is no table "users" which the SQL script references, that is the problem causing the error. In my case there are 3 user tables "rc_users", "gmx_users" and "gmail_users".

So the issue is, that this plugin doesn't take the optional database prefix into account.