Cron scripts give error

[Tsukasa]

Hello, I have Vesta installation on Ubuntu 14.04, courtesy of Digital Ocean cloud service, and I am getting on all the cron jobs:
(I could not check the exact version of Vesta, I believe it is from February 2016, because for some reason I could not login now - must be some load issues with the tiny instance I have.)

sed: -e expression #1, char 3: unknown command: `
'
sed: -e expression #1, char 3: unknown command: `
'
/usr/local/vesta/func/main.sh: line 485: 1
1: syntax error in expression (error token is "1")
/usr/local/vesta/func/main.sh: line 485: 1
1: syntax error in expression (error token is "1")
/usr/local/vesta/func/main.sh: line 485: 1
1: syntax error in expression (error token is "1")

how this could be fixed?