I have been a neglectful webmaster for many years. I am now trying to get my website in order since I moved to my new host. I am experiencing a weirdness with the webmail on my domain. Hopefully, someone has some wisdom or experience that they can share with me to help address this problem.
If I go to webmail.example.com I get the login screen which has a warning
The security token is missing from your request
but I can log in and then I can choose horde, roundcube or SquirrelMail.
But horde gives me this error:
A fatal error has occurred
Session cookies will not work without a FQDN and with a non-empty cookie domain. Either use a fully qualified domain name like "http://www.example.com" instead of "http://example" only, or set the cookie domain in the Horde configuration to an empty value, or enable non-cookie (url-based) sessions in the Horde configuration.
Details have been logged for the administrator.
roundcube seems to be working ok and SquirrelMail was refusing to let me past some setup last night, but is now showing me mail.
I looked for guidance on the horde message but all I could find was a tangentially related message on the cPanel Forum. I don't use the webmail myself, usually, but my daughter does. The instructions seem fairly forthright in the error message, but I have no idea
how to do those things. I don't see anything in cPanel related to horde and the only thing that stands out to me in the file directory is .cphorde which doesn't have much in it except logs, from what I see. The configuration files are somewhere else.
If I go to example.com:2096 I get the login without error message and all three webmail applications work. I suppose the doctor's infamous response of "Well then, don't
do that." comes to mind, but I am trying to get things working correctly after a decade of neglect.
Any assistance, comments or guidance is gratefully accepted.