After export metadata from "Export\Metadata" I get Unauthorized 401 error 
message when I click in csv file output. 

It's an URL like this: 

http://localhost:4000/bitstreams/8e7eec16-76b6-4a6b-bfe4-7ef96b88bd7c/download

This is a log example:

2022-06-20 13:20:01,594 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:01,594 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:01,616 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:01,616 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
77f2c73b-64e4-463d-8a60-9f11bacdf71b 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET /server721/api] originated from /
2022-06-20 13:20:03,934 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:03,934 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:03,965 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:03,965 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
277d98eb-4ac4-4523-a7ea-a6e032d31911 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET /server721/api] originated from /
2022-06-20 13:20:06,020 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:06,020 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:06,036 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:06,036 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
7fd46ec4-4ea9-4b75-80b5-586599bbee92 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET /server721/api/system/processes/2] originated from /
2022-06-20 13:20:21,011 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:21,011 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:21,026 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:21,026 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
bc9bf16d-b58c-4c69-b92e-61713b14ab50 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET /server721/api] originated from /processes/2
2022-06-20 13:20:23,335 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:23,335 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:23,357 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:23,357 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
ed348e92-17ae-4875-88a9-2ac6873751d2 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET /server721/api] originated from /processes/2
2022-06-20 13:20:25,390 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:25,390 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:25,405 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:25,405 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:25,421 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:25,421 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:25,421 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
705a17c7-31c8-4661-835c-950d9b3abf32 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET 
/server721/api/core/bitstreams/be3264c9-1263-401e-ad30-2b2f0a2180e2/bundle] 
originated from /processes/2
2022-06-20 13:20:25,421 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
9c5bcc7e-e978-453c-a888-8e91c2d125e2 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET 
/server721/api/core/bitstreams/be3264c9-1263-401e-ad30-2b2f0a2180e2/format] 
originated from /processes/2
2022-06-20 13:20:25,437 DEBUG 9cf3d41f-12e5-4b27-ad88-8765b011ab37 
9c5bcc7e-e978-453c-a888-8e91c2d125e2 
org.dspace.content.BitstreamServiceImpl @ 
::find_bitstream:bitstream_id=be3264c9-1263-401e-ad30-2b2f0a2180e2
2022-06-20 13:20:25,437 DEBUG 9cf3d41f-12e5-4b27-ad88-8765b011ab37 
705a17c7-31c8-4661-835c-950d9b3abf32 
org.dspace.content.BitstreamServiceImpl @ 
::find_bitstream:bitstream_id=be3264c9-1263-401e-ad30-2b2f0a2180e2
2022-06-20 13:20:25,513 DEBUG unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ Received valid token for 
username: 
2022-06-20 13:20:25,513 DEBUG unknown unknown 
org.dspace.app.rest.security.StatelessAuthenticationFilter @ Found 
authentication data in request for EPerson 
2022-06-20 13:20:25,513 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:25,513 INFO  9cf3d41f-12e5-4b27-ad88-8765b011ab37 
26b514ab-1485-4479-9d1d-98bcbb0330d1 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[POST /server721/api/authn/shortlivedtokens] originated from 
/bitstreams/be3264c9-1263-401e-ad30-2b2f0a2180e2/download
2022-06-20 13:20:25,513 DEBUG 9cf3d41f-12e5-4b27-ad88-8765b011ab37 
26b514ab-1485-4479-9d1d-98bcbb0330d1 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:25,513 DEBUG 9cf3d41f-12e5-4b27-ad88-8765b011ab37 
26b514ab-1485-4479-9d1d-98bcbb0330d1 org.dspace.core.Context @ Cache size 
on commit is 22
2022-06-20 13:20:27,549 WARN  unknown unknown 
org.dspace.app.rest.security.jwt.JWTTokenHandler @ 127.0.0.1 tried to use 
an expired or non-valid token
2022-06-20 13:20:27,549 DEBUG unknown unknown 
org.dspace.core.LegacyPluginServiceImpl @ Adding Sequence plugin for 
interface= org.dspace.authenticate.AuthenticationMethod, 
class=org.dspace.authenticate.PasswordAuthentication
2022-06-20 13:20:27,549 INFO  unknown e8f70cdc-d0fd-4645-852a-1428fcb09857 
org.dspace.app.rest.utils.DSpaceAPIRequestLoggingFilter @ Before request 
[GET 
/server721/api/core/bitstreams/be3264c9-1263-401e-ad30-2b2f0a2180e2/content] 
originated from http://localhost:4000/
2022-06-20 13:20:27,564 DEBUG unknown e8f70cdc-d0fd-4645-852a-1428fcb09857 
org.dspace.content.BitstreamServiceImpl @ 
anonymous::find_bitstream:bitstream_id=be3264c9-1263-401e-ad30-2b2f0a2180e2
2022-06-20 13:20:27,564 WARN  unknown e8f70cdc-d0fd-4645-852a-1428fcb09857 
org.dspace.app.rest.exception.DSpaceApiExceptionControllerAdvice @ 
Authentication is required (status:401)

Thanks

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