Connecting Signal-iOS with on-premise Siganl-Server

Hello I have a working on-premise Signal server, and i have build the Signal-iOS successfully as well. then I put my certificate inside certificates folder "[login to view URL]" as well and i have connected to my signal server successfully. When I run the application, i did receive the OTP and i can verify it successfully, but on the Profile screen the application crash and the error is:- 2020-07-26 11:55:16:266 Signal[11000:3683664] ? [TSNetworkManager.m:466 +[TSNetworkManager logCurlForTask:]]: curl for failed request: curl -v -k -X POST -H 'User-Agent: Signal/3.12.2 (iPhone; iOS 13.6; Scale/2.00)' -H 'Accept-Language: en-IQ;q=1, de-IQ;q=0.9, ar-IQ;q=0.8' -H 'Content-Type: multipart/form-data; boundary=Boundary+A6B3CAAF894BC8B8' -H 'Content-Length: 2138' [login to view URL] 2020-07-26 11:55:16:266 Signal[11000:3683664] ❤️ [[login to view URL] upload(data:uploadForm:uploadUrlPath:progressBlock:)]: Error: Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLStringKey=[login to view URL], NSErrorFailingURLKey=[login to view URL], _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalUploadTask <6139934D-583E-4F84-B553-20BE96D3854D>.<1>" ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask <6139934D-583E-4F84-B553-20BE96D3854D>.<1>, NSLocalizedDescription=cancelled} Fatal error: [[login to view URL] upload(data:uploadForm:uploadUrlPath:progressBlock:)]: Error: Error Domain=NSURLErrorDomain Code=-999 "cancelled" UserInfo={NSErrorFailingURLStringKey=[login to view URL], NSErrorFailingURLKey=[login to view URL], _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalUploadTask <6139934D-583E-4F84-B553-20BE96D3854D>.<1>" ), _NSURLErrorFailingURLSessionTaskErrorKey=LocalUploadTask <6139934D-583E-4F84-B553-20BE96D3854D>.<1>, NSLocalizedDescription=cancelled}: file ***********/Signal-iOS/Pods/SignalCoreKit/SignalCoreKit/src/[login to view URL], line 35 (lldb) I'm using AWS as CDN and i think the error coming from it.