# Failed to connect: Error: TrustFailure (Authentication failed, see inner exception.)

**URL:** <https://forum.duplicati.com/t/failed-to-connect-error-trustfailure-authentication-failed-see-inner-exception/13512>\
**Category:** Support\
**Created:** [December 7, 2021, 3:17pm UTC](https://forum.duplicati.com/t/failed-to-connect-error-trustfailure-authentication-failed-see-inner-exception/13512 "2021-12-07T15:17:32Z")\
**Posts on this page:** 1\
**Showing post:** 14

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**Author:** ![yarcod](https://forum.duplicati.com/user_avatar/forum.duplicati.com/yarcod/32/6696_2.png) [@yarcod](https://forum.duplicati.com/u/yarcod)\
**Post date:** [March 24, 2022, 1:16pm UTC](https://forum.duplicati.com/t/failed-to-connect-error-trustfailure-authentication-failed-see-inner-exception/13512/14 "2022-03-24T13:16:38Z")

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I just wanted to get back to this thread with what issue I was facing, and how I solved it (in case a future Googler lands here):

While the initial Trust Failure was successfully resolved with the method @drwtsn32 [suggested](https://forum.duplicati.com/t/failed-to-connect-error-trustfailure-authentication-failed-see-inner-exception/13512/6), I had an additional 401 - Unauthorized error appearing. The error message was quite confusing, as 401 normally indicates an HTTP(S) error, but in fact the unauthorized error I got was from when trying to access files over SMB. At some point I must have changed some permission setting, making Duplicati unable to access the mounted /source directory. It was just unfortunate that those two errors came after one another.

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_[View the full topic](https://forum.duplicati.com/t/failed-to-connect-error-trustfailure-authentication-failed-see-inner-exception/13512)._