Hi,
I added a new S3 compatible site. From the WinSCP UI - I can access the site. I then created a batch-file by copying the text from the batch-file format of the "Generate Session URL/Code" options. Still - when trying to run the batch-file - I receive an "Access denied" error. The log file is following. What is wrong?
. 2026-05-04 05:47:00.774 --------------------------------------------------------------------------
. 2026-05-04 05:47:00.774 WinSCP Version 5.19.5 (Build 11933 2021-11-25) (OS 10.0.20348 - Windows Server 2022 Standard)
. 2026-05-04 05:47:00.774 Configuration: nul
. 2026-05-04 05:47:00.774 Log level: Normal
. 2026-05-04 05:47:00.774 Local account: SHIFMAN\accadia
. 2026-05-04 05:47:00.774 Working directory: C:\Accadia\TBD\AutoTasks
. 2026-05-04 05:47:00.774 Process ID: 6092
. 2026-05-04 05:47:00.790 Ancestor processes: WinSCP, cmd, explorer, ...
. 2026-05-04 05:47:00.790 Command-line: "C:\Program Files (x86)\WinSCP\WinSCP.exe" /console=5.19.5 /consoleinstance=_10964_363 "/log=C:\Temp\WinSCP.log" "/ini=nul" "/command" "open s3://7080e6bdab5b3442b8dc273265e82f9d:***@e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com/" "Your command 1" "Your command 2" "exit"
. 2026-05-04 05:47:00.790 Time zone: Current: GMT-7, Standard: GMT-8 (Pacific Standard Time), DST: GMT-7 (Pacific Daylight Time), DST Start: 03/08/2026, DST End: 11/01/2026
. 2026-05-04 05:47:00.790 Login time: 05/04/2026 05:47:00
. 2026-05-04 05:47:00.790 --------------------------------------------------------------------------
. 2026-05-04 05:47:00.790 Script: Retrospectively logging previous script records:
> 2026-05-04 05:47:00.790 Script: open s3://7080e6bdab5b3442b8dc273265e82f9d:***@e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com/
. 2026-05-04 05:47:00.790 --------------------------------------------------------------------------
. 2026-05-04 05:47:00.790 Session name: 7080e6bdab5b3442b8dc273265e82f9d@e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com (Ad-Hoc site)
. 2026-05-04 05:47:00.790 Host name: e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com (Port: 443)
. 2026-05-04 05:47:00.790 User name: 7080e6bdab5b3442b8dc273265e82f9d (Password: Yes, Key file: No, Passphrase: No)
. 2026-05-04 05:47:00.790 Transfer Protocol: S3
. 2026-05-04 05:47:00.790 Proxy: None
. 2026-05-04 05:47:00.790 HTTPS: Yes
. 2026-05-04 05:47:00.790 S3: URL Style: Virtual Host
. 2026-05-04 05:47:00.790 TLS/SSL versions: TLSv1.0-TLSv1.3
. 2026-05-04 05:47:00.790 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2026-05-04 05:47:00.790 Cache directory changes: Yes, Permanent: Yes
. 2026-05-04 05:47:00.790 Recycle bin: Delete to: No, Overwritten to: No, Bin path:
. 2026-05-04 05:47:00.790 --------------------------------------------------------------------------
< 2026-05-04 05:47:00.790 Script: Connecting to host...
. 2026-05-04 05:47:00.790 Trying to open directory "/".
. 2026-05-04 05:47:00.790 HTTP session to https://e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com:443 begins.
. 2026-05-04 05:47:00.790 ssl: SNI enabled by default.
. 2026-05-04 05:47:00.790 Sending request headers:
. 2026-05-04 05:47:00.790 GET /?max-keys=1 HTTP/1.1

. 2026-05-04 05:47:00.790 User-Agent: WinSCP/5.19.5 neon/0.31.2

. 2026-05-04 05:47:00.790 Keep-Alive:

. 2026-05-04 05:47:00.790 Connection: TE, Keep-Alive

. 2026-05-04 05:47:00.790 TE: trailers

. 2026-05-04 05:47:00.790 Host: e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com

. 2026-05-04 05:47:00.790 Authorization: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

. 2026-05-04 05:47:00.790 x-amz-date: 20260504T124700Z

. 2026-05-04 05:47:00.790 x-amz-content-sha256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
. 2026-05-04 05:47:00.790 Sending request-line and headers:
. 2026-05-04 05:47:00.790 Doing DNS lookup on e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com...
. 2026-05-04 05:47:00.805 req: Connecting to 172.64.66.1:443
. 2026-05-04 05:47:00.805 Doing SSL negotiation.
. 2026-05-04 05:47:00.821 Identity match for 'e6880b282826f37572bc40868401a011.r2.cloudflarestorage.com': good
. 2026-05-04 05:47:00.821 Verifying certificate for "r2.cloudflarestorage.com" with fingerprint a6:ae:c5:20:82:bd:cb:34:cb:72:ad:6e:fe:fc:55:8b:71:aa:85:ba:64:05:de:f7:1e:4d:a5:e2:72:83:6f:c2 and 08 failures
. 2026-05-04 05:47:00.868 Certificate verified against Windows certificate store
. 2026-05-04 05:47:00.868 Using TLSv1.3, cipher TLSv1.3: TLS_AES_256_GCM_SHA384,
. 2026-05-04 05:47:00.868 Request sent; retry is 0.
. 2026-05-04 05:47:00.884 [status-line] < HTTP/1.1 403 Forbidden
. 2026-05-04 05:47:00.884 Header Name: [date], Value: [Mon, 04 May 2026 12:46:51 GMT]
. 2026-05-04 05:47:00.884 Header Name: [content-type], Value: [application/xml]
. 2026-05-04 05:47:00.884 Header Name: [content-length], Value: [110]
. 2026-05-04 05:47:00.884 Header Name: [connection], Value: [keep-alive]
. 2026-05-04 05:47:00.884 Header Name: [server], Value: [cloudflare]
. 2026-05-04 05:47:00.884 Header Name: [cf-ray], Value: [9f679c51b8828e4e-TLV]
. 2026-05-04 05:47:00.884 End of headers.
. 2026-05-04 05:47:00.884 Request ends, status 403 class 4xx, error line:
. 2026-05-04 05:47:00.884 403 Forbidden
. 2026-05-04 05:47:00.884 Access Denied
< 2026-05-04 05:47:00.884 <?xml version="1.0" encoding="UTF-8"?><Error><Code>AccessDenied</Code><Message>Access Denied</Message></Error>
. 2026-05-04 05:47:00.884 Request ends.
. 2026-05-04 05:47:00.884 sess: Destroying session.
. 2026-05-04 05:47:00.884 sess: Closing connection.
. 2026-05-04 05:47:00.884 sess: Connection closed.
< 2026-05-04 05:47:00.884 Script: Access denied.
< 2026-05-04 05:47:00.884 Access Denied

< 2026-05-04 05:47:00.884 Connection failed.