Ok.PLease change the password line to: web101:x:1054:1045::/var/www/clients/client45/web101/./home/web101:/bin/false
This was an ispconfig problem that could occur when a specific userw as logged in while the cronjob was craeted so hat the usermod command to modify the passwd file failed. This problem has been fixed in the current ispconfig versions but the fix only applies to new websites that were created with the latest ispconfig. The website on your server has been created with a older version of ispconnfig, so you have to fix that in the password file.
Now I get this error: Code: Mar 28 14:50:01 webserver jk_chrootsh[28381]: now entering jail /var/www/clients/client45/web101 for user web101 (1054)
Not every line that you see in a logfile is a error If a message does not mention words like error, warning, abort etc, then its a success message which is the opposite of an error. The message you posted indicates that the cron has been executed as user web101.