Unable to get user auth token



[TwitterKit] did encounter error with message “Unable to authenticate using the system account.”: Error Domain=TWTRLogInErrorDomain Code=0 “User denied access to system accounts.” UserInfo={NSLocalizedDescription=User denied access to system accounts., NSLocalizedRecoverySuggestion=Give this user access to the System Twitter account.}
2018-06-14 21:05:15.199771+0800 NewsDev[58771:2274976] [TWTRURLSessionDelegate] Cancelling API request, SSL certificate is invalid.
2018-06-14 21:05:15.200341+0800 NewsDev[58771:2273597] [TwitterKit] did encounter error with message “Error obtaining user auth token.”: Error Domain=TWTRLogInErrorDomain Code=-1 “” UserInfo={NSLocalizedDescription=}


How can I do something to resovle this issue