messages remain in the tmp directory

Hello I install getmail in my hiphone, (xiaomi redmi 5 plus) but the messages
remain in tmp directory, they do not go in the "new" directory.
getmail works in the play store termux app.

cat .getmail/getmailrc

[retriever]
type = SimplePOP3Retriever
server = pop.free.fr
username = my-username
password = xxxxxx

[destination]
type = Maildir
path = $HOME/Maildir/mbox/

[options]
delete = false
message_log = $HOME/.getmail/log

cat log

2021-09-21 15:59:36 Delivery error (maildir delivery 11839 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
2021-09-21 15:59:36 msg 1/9 (1711 bytes) msgid 80320.Wki1UfLDNUF0AuqpfQ8NN9CtulG9JGbjbn8GHV9SV5w= from <[email protected]>
2021-09-21 15:59:36 Delivery error (maildir delivery 11840 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
2021-09-21 15:59:36 msg 2/9 (1680 bytes) msgid 80321.DwPMvn5mi,vPKEB0S3UdSRU4dK6PHiVRjXDV5XFafaM= from <[email protected]>
2021-09-21 15:59:36 Delivery error (maildir delivery 11841 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
2021-09-21 15:59:36 msg 3/9 (7547 bytes) msgid 80323.CGiw4liyRd3fz17UQ9ejnpZLhBKKdjHbyqazloot47M= from <[email protected]>
2021-09-21 15:59:36 Delivery error (maildir delivery 11842 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
2021-09-21 15:59:36 msg 4/9 (11303 bytes) msgid 80324.EAmG3yEOPK+,JggAVWTIIebjdFRwgCdHPEcU5g7IcUo= from <[email protected]>
2021-09-21 15:59:36 Delivery error (maildir delivery 11843 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
2021-09-21 15:59:36 msg 5/9 (20971 bytes) msgid 80340.eRSWTC+LH41acsx8OSW8N,NMRTKdImszgoZlt21sB5w= from
+<[email protected]>
2021-09-21 15:59:36 Delivery error (maildir delivery 11844 error (127, maildir delivery process failed (module 'os' has no attribute
+'link')))
.................

Thanks in advance for any help.

-- 
Gerard
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