I don't see your attempt of importing from stable in the logs. I only see this:
1726318345.runtime.log:2024-09-14 13:02:14 [error]: Beatmap download failed!
1726318345.runtime.log:2024-09-14 13:02:14 [error]: System.Net.WebException: Request to https://assets.ppy.sh/client-resources/bundled/319473.osz timed out after 60 seconds idle (read 275163 bytes, retried 0 times).
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.IO.Network.WebRequest.Complete(Exception e)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.IO.Network.FileWebRequest.Complete(Exception e)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.IO.Network.WebRequest.internalPerform(CancellationToken cancellationToken)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.IO.Network.WebRequest.PerformAsync(CancellationToken cancellationToken)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.Extensions.ExceptionExtensions.ExceptionExtensions.Rethrow(Exception exception)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.Extensions.ExceptionExtensions.ExceptionExtensions.RethrowAsSingular(AggregateException aggregateException)
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Framework.IO.Network.WebRequest.Perform()
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Game.Online.API.APIRequest.Perform()
1726318345.runtime.log:2024-09-14 13:02:14 [error]: at osu.Game.Online.API.APIAccess.Perform(APIRequest request)
This could be explained by a network connection failure, but again, this is from downloading a map afresh, not from a stable import.
Could you try importing from stable again and then attach the logs again
after that?