After upgrade from 11.1.10 version to 12.1.1 version the mention api is throwing error as below
$core_v2_mentionable.List("SatishKumar65135")
//Here SatishKumar65135 is username
and the error is
[ApiList-of-Mentionable] Errors [IList-of-Error] [0] [Error] HttpStatusCode: 500 [Int32] Message: "We apologize, but an unexpected issue prevented the page you requested from being available. We've logged the issue so the site administrator can resolve the problem." [String] Type: "That Was Unexpected" [String] Count: 1 [Int32] Warnings [IList-of-Warning] AsArray() [Array-of-Mentionable] Get(String index) [Mentionable] HasErrors() [Boolean] ThrowErrors() [Void]
