Password reset email notification (127.0.0.1)

receive “password reset on 127.0.0.1” in subject of email while password reseting by email.
centos 7
seafile 7.1.4
Hi, I can set “site_name” and see it only in body of email, but subject shows me “127.0.0.1”
I cant find any other *.py with email settings in my server.
How can I change 127.0.0.1?
What to do?)

Thank you very much!
Just fixed this by
rm -rf /usr/bin/python
ln -s /usr/bin/python3 /usr/bin/python
systemctl restart seafile
#check
rm -rf /usr/bin/python
ln -s /usr/bin/python2 /usr/bin/python
systemctl restart seafile
#check

python version was 2 before starting

Looks weird but still works)