The validity date of authentication may have expired. Users who already use Link to Xero will have to sign in Xero again.
Recovery for problem
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Select Xero again for Cloud service.
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Select Yes to the dialog below.
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Input your e-mail address and password.
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Select [Continue granting access].
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Select [Allow access].
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Specify again a destination for [Save to] (otherwise, the default tenant/user will be automatically selected).
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Press [Save] to save the profile. After that, press [Retry] to save the erroneous scanned data.