Or maybe there is a log with something more informative which I could check up
Perhaps artifacts were uploaded to the fileserver? part of the backup/restore is copying the fileserver folder...
The docs contain backup and restore instructions, which is basically what you should do. The process includes copying all data folder, primerily for mongo and elastic
What exactly we need to copy? I believe we have already copied everything, but it keeps throwing "Fetch experiment failed" error
Well, the best way is to simply copy the data folders when setting up your new server - this way you won't risk the old server and can get a new upgraded server with the existing data
SuccessfulKoala55 Turns out we have copied elasticsearch database as well. Also it seems that the error is thrown only for experiments with artifacts
For experiments with no artifacts, everything seems to work properly