Manager-server fails to start after upgrade

I have been using Manager Server edition on Ubuntu 14 since 2018 and it has been running smoothly, today I decided to upgrade it following instructions “Ubuntu | Manager

After the upgrade, the manager server wont start. I tried to start it then check status with command “systemctl status manager-server” I get the error below
manager-server.service
Loaded: loaded (/etc/systemd/system/manager-server.service; enabled)
Active: failed (Result: start-limit) since Fri 2022-09-16 10:50:29 EDT; 1h 27min ago
Process: 14574 ExecStart=/usr/bin/mono /usr/share/manager-server/ManagerServer.exe -port 8080 (code=exited, status=1/FAILURE)

Kindly assist!

AFAIK the latest versions don’t use Mono anymore. I would remove all previous files and perform a clean install. I hope you’ve been making regular updates of the manager business files?

In addition to the good advise by @Mark Please note that for Manager you need at least Ubuntu 16.04 LTS (64-bit). The requirements for Server and Desktop are same and at Download | Manager it shows at least Ubuntu 16.04. I use Ubuntu 20.04 LTS (64-bit) on quite an old server, but 16.04 will work.

Hi Mark, Eko,

Thanks for the heads-up. My server versions both Manager and OS were far left behind. Had to upgrade Ubuntu to 20.04 LTS and then reinstalled Manager the current version, it all went smoothly. Now working on migrating users (manually) as the business backup didn’t include users.

The challenge I’m having now is, Manager licenses for the previous version is not supported in the current version. When I put the key I get the error “Entered product key is valid for versions 19.10 or lower. This is version 22.9”

That’s clearly explained here.

Hi everyone, have my problems resolved now, had to purchase another license at a half the price, which was good. Thanks every one for your support.