I sent an email from a known email address (account exists), but no tickets are created.
Can someone please help?
In the cron logs I can find the following:

cron-stdout.log:

[auth_saml] Missing settings from '/usr/src/app/config/plugins/auth_saml/settings.yml', skipping omniauth registration.

[cron] Rescheduling in 600s

[cron] Checking for new emails from IMAP

`/root` is not writable.

Bundler will use `/tmp/bundler/home/unknown' as your home directory temporarily.

hook registered

[auth_saml] Missing settings from '/usr/src/app/config/plugins/auth_saml/settings.yml', skipping omniauth registration.

[cron] Rescheduling in 600s

cron-stderr.log:

(See full trace by running task with --trace)

Rails Error: Unable to access log file. Please ensure that /usr/src/app/log/production.log exists and is writable (ie, make it writable for user and group: chmod 0664 /usr/src/app/log/production.log). The log level has been raised to WARN and the output directed to STDERR until the problem is fixed.

rake aborted!

Errno::ECONNREFUSED: Connection refused - connect(2) for 0.0.0.0:993

/usr/src/app/lib/redmine/imap.rb:53:in `new'

/usr/src/app/lib/redmine/imap.rb:53:in `connect_imap'

/usr/src/app/lib/redmine/imap.rb:37:in `check'

/usr/src/app/lib/tasks/email.rake:151:in `block (3 levels) in <top (required)>'

/usr/local/bundle/gems/rake-12.3.1/exe/rake:27:in `<top (required)>'

/usr/local/bundle/bin/bundle:23:in `load'

/usr/local/bundle/bin/bundle:23:in `<main>'

Tasks: TOP => redmine:email:receive_imap

(See full trace by running task with --trace)