Unable to start the server. On an error / any of the containers(modules) are failed
The most reported are due to 'Low disk space' in the drive.
For low disk space,
Clean up older backup files (set cleanup schedule to remove older backups)
Expand the memory (If it is a VM workstation).
On a worst case, move the old file attachments / inline images found under C:\ManageEngine\ServiceDesk\fileattachments / C:\ManageEngine\ServiceDesk\inlineimages to a temporary location.