Investigate svn loading failure

From an email:

Dear support,

today I saved my open-source project CSTNU
(https://profs.scienze.univr.it/posenato/svn/sw/CSTNU) in SoftwareHeritage.
The process was successful and ended at 10/20/2021, 12:08:10 PM.

After few minutes, I need to save again the repository and, therefore, I made
another 'Save' request.
The request was scheduled at 10/20/2021, 12:12:28 PM but, then. failed.
Log:
2021-10-20 11:16:23,942: INFO/ForkPoolWorker-1] Task
swh.loader.svn.tasks.DumpMountAndLoadSvnRepository[709297c6-4de6-4a16-b7bb-a242c9ca8234]
succeeded in 235.8857956090942s: {'status': 'failed'}


Then, I verified that my SVN server was running correctly.
I found no problem.

Then, I tried again a save action, but I always received a 'failed' status.

The last try was schedule at 10/20/2021, 12:12:28 PM and there is no log, just
failed status.

Is it possible to know which is the error?

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Migrated from T3694 (view on Phabricator)