Internal error (500) when trying to copy big-size object from bucket to another bucket

CloudBerry Explorer
1

I’m using CloudBerry Explorer to copy files from one bucket to another bucket. both buckets are under the same project on Google Cloud Platform. I can easily copy small size files but when trying to copy 500MB+ files from the same path to the other, I get an error:

The remote server returned an error: (500) Internal Server Error.

Permissions are correct since moving small size files is fine.
I tested it and I can copy the files with the web GUI and the gsutil command with the same service account that is being used with CloudBerry.

What could be the issue?

CloudBerry Log:

2020-12-09 14:23:52,298 [Google] [9] INFO  - InternalGetObjectExists start, bucket: DEDUCTED-BUCKET, key DEDUCTED-FILENAME.mp4
2020-12-09 14:23:52,781 [Google] [9] INFO  - InternalGetObjectExists ready, bucket: DEDUCTED-BUCKET, key DEDUCTED-FILENAME.mp4, status: 404
2020-12-09 14:23:52,782 [Google] [9] INFO  - InternalGetObjectExists start, bucket: DEDUCTED-BUCKET, key DEDUCTED-PATH/DEDUCTED-FILENAME.mp4
2020-12-09 14:23:52,992 [Google] [9] INFO  - InternalGetObjectExists ready, bucket: DEDUCTED-BUCKET, key DEDUCTED-PATH/DEDUCTED-FILENAME.mp4, status: 200
2020-12-09 14:23:52,992 [Google] [9] INFO  - InternalCopyObjectNonChunked start, src bucket: DEDUCTED-BUCKET, src key: DEDUCTED-PATH/DEDUCTED-FILENAME.mp4, dst bucket: DEDUCTED-BUCKET, dst key: DEDUCTED-FILENAME.mp4
2020-12-09 14:25:17,510 [Google] [9] INFO  - InternalCopyObjectNonChunked ready, src bucket: DEDUCTED-BUCKET, src key: DEDUCTED-PATH/DEDUCTED-FILENAME.mp4, dst bucket: DEDUCTED-BUCKET, dst key: DEDUCTED-FILENAME.mp4, status: 500
2020-12-09 14:25:17,510 [Google] [9] ERROR - Http response status: 500: Internal Server Error
2020-12-09 14:25:17,511 [Google] [9] ERROR - <?xml version='1.0' encoding='UTF-8'?><Error><Code>InternalError</Code><Message>We encountered an internal error. Please try again.</Message><Details>AFfi+BFP7TevpPSJUbrZ2g1VXu3cm/uZHLEPxDMKeQro1D9stEU/xcIHUePCm9meA3u2N+gGUX41/UHUd1WIDNA+tOjFrbNRZsC2T8twlFOBURzaHcO5GfU=</Details></Error>
2020-12-09 14:25:17,511 [Google] [9] ERROR - InternalCopyObjectNonChunked failed. src bucket: DEDUCTED-BUCKET, src key: DEDUCTED-PATH/DEDUCTED-FILENAME.mp4, dst bucket: DEDUCTED-BUCKET, dst key: DEDUCTED-FILENAME.mp4
CloudBerryLab.Base.Exceptions.Status500Exception
The remote server returned an error: (500) Internal Server Error.

System.Net.WebException
The remote server returned an error: (500) Internal Server Error.
   at System.Net.HttpWebRequest.GetResponse()
   at gZ.A(HB , Action1` , HttpWebRequest , HS )

2020-12-09 14:25:17,513 [CL] [9] ERROR - Command::Run failed:
Copy; Source:DEDUCTED-PATH/DEDUCTED-FILENAME.mp4; Destination:/DEDUCTED-BUCKET/
CloudBerryLab.Base.Exceptions.Status500Exception: The remote server returned an error: (500) Internal Server Error. ---> System.Net.WebException: The remote server returned an error: (500) Internal Server Error.
   at System.Net.HttpWebRequest.GetResponse()
   at gZ.A(HB , Action1` , HttpWebRequest , HS )
   --- End of inner exception stack trace ---
   at Tm.a(String , String , String , String , String , MetadataDirective , Gw , Jt )
   at Tm.A(String , String , String , String , String , String , Gw )
   at sU.A(Tm , sU , Gw , lD )
   at sU.BV(lL , String , lD )
   at lF.RunInternal()
   at SE.RunInternal()
   at lE.fa()