Thanks for the suggestions.
It's a premium account with all classes available. I logged the bot char in the game and no problem but still the same error when I try to start the bot in Linux. Works fine when I start the bot in Windows with the same account and bot char.
What I have done is to first run the bot on my desktop Windows 7 64bits and everything works fine, except that I sometimes have to restart my computer and that's why I want to move it to a stable Linux system. So from the Windows to the Linux system I did export and import the database, moved the bot files and made changes to the config files for Linux.
Any possibility that the problem is because it used to be run in Windows but now in Linux?