Any idea about this error? I am getting this while connecting to the SFTP server and tried all the possible solutions given in forums and it didn't work.
More logs:
2019-03-27 12:39:08.543 DEBUG Sftp(1)[9] SSH: Negotiating key.
2019-03-27 12:39:08.575 DEBUG Sftp(1)[9] SSH: Received 2048-bit Diffie-Hellman prime (minimum allowed size is 1024 bits).
2019-03-27 12:39:08.590 VERBOSE Sftp(1)[9] SSH: Sending packet SSHMSGKEXDHGEXINIT (262 bytes).
0000 |20-00-00-01-01-00-CA-0A 9D-58-C3-5C-27-C7-A9-FE| ........X.\'...
0010 |53-9D-36-E4-C9-C1-48-D2 74-EF-1B-CE-B3-F2-21-CC| S.6...H.t.....!.
0020 |1F-85-48-B7-D3-8C-18-47 E1-76-77-EB-54-C5-90-2F| ..H....G.vw.T../
0030 |43-BF-14-81-D6-CE-D1-22 DC-57-6B-34-F7-02-6B-C4| C......".Wk4..k.
0040 |BC-F4-96-E2-00-26-81-D1 D5-0C-68-25-1B-B4-7E-F8| .....&....h%..~.
0050 |AB-05-34-A1-4E-4C-8F-84 1F-A6-D6-90-2D-65-25-B0| ..4.NL......-e%.
0060 |48-94-87-71-92-8E-AE-D7 10-D5-C4-91-8F-1A-61-68| H..q..........ah
0070 |2D-4F-64-C5-51-0D-2C-DB 7C-FC-65-11-83-86-38-24| -Od.Q.,.|.e...8$
0080 |DA-B8-57-12-16-59-00-21 6D-28-01-A2-4D-44-FC-58| ..W..Y.!m(..MD.X
0090 |CF-3C-B9-9D-05-26-9B-5D D4-F5-C3-CD-88-FF-06-08| .<...&.]........
00A0 |FE-71-BB-88-EF-07-11-72 DC-48-E5-96-9B-FD-41-00| .q.....r.H....A.
00B0 |2A-41-DF-5D-36-55-13-0D 9A-14-ED-FE-E5-76-28-46| *A.]6U.......v(F
00C0 |E4-90-01-41-D1-9E-62-4F 7B-BF-6A-E6-28-2B-FF-4B| ...A..bO{.j.(+.K
00D0 |1E-99-4B-29-B5-57-10-76 4B-D4-C2-22-66-5A-B5-45| ..K).W.vK.."fZ.E
00E0 |74-CE-E1-31-BB-39-27-8B 7A-CD-D1-BF-D2-A0-89-87| t..1.9'.z.......
00F0 |0F-C6-CC-08-6A-95-23-21 61-36-CF-0C-31-75-BE-E7| ....j.#!a6..1u..
0100 |0A-8F-9F-92-01-A6 | ......
2019-03-27 12:39:08.731 VERBOSE Sftp(1)[11] SSH: Received packet SSHMSGDISCONNECT (35 bytes).
0000 |01-00-00-00-0B-00-00-00 16-49-6E-74-65-72-6E-61| .........Interna
0010 |6C-20-73-65-72-76-65-72 20-65-72-72-6F-72-2E-00| l server error..
0020 |00-00-00 | ...
2019-03-27 12:39:08.731 INFO Sftp(1)[11] SSH: Disconnected by the server ('Internal server error').
2019-03-27 12:39:08.731 VERBOSE Sftp(1)[11] SSH: Sending packet SSHMSG_DISCONNECT (27 bytes).
0000 |01-00-00-00-0B-00-00-00 0E-53-65-73-73-69-6F-6E| .........Session
0010 |20-63-6C-6F-73-65-64-00 00-00-00 | closed....
2019-03-27 12:39:08.793 ERROR Sftp(1)[9] SSH: Negotiation failed. Disconnected by the server ('Internal server error').
2019-03-27 12:39:08.856 ERROR Sftp(1)[9] Info: Rebex.Net.SshException: Disconnected by the server ('Internal server error').
at Rebex.Net.SshSession.tssd[b,c](dixd2 aga, Int32 agb, dixe agc, c agd, b age, b agf)
at Rebex.Net.SshSession.tssc[b,c](dixd
2 afy, c afz)
at Rebex.Net.SshSession.tssk(jcqm ago)
at jcqq.xkxw(SshSession bac, Byte[] bad, Byte[] bae, Byte[] baf, Byte[] bag, jcqg& bah, Byte[]& bai, SshPublicKey& baj)
at Rebex.Net.SshSession.tssm(Byte[] agp)
at Rebex.Net.SshSession.Negotiate()
at Rebex.Net.Sftp.mtxo.klsf(kuvq alr, Boolean als)
at Rebex.Net.Sftp.nqyl(String po, Int32 pp, SshParameters pq, kuvq pr)