As  the title says. Unable to sync outlook with android and windows app. I get this error in android.

An internal server error occurred. The operation failed. (ErrorInternalServerError)

Action: SyncCalendarList

XCalendarApp.ProviderBase.Exceptions.AccountRequestException: An internal server error occurred. The operation failed. (ErrorInternalServerError) ---> CodeSpark.Apps.Common.Net.Exceptions.HttpException: net_http_message_not_success_statuscode_reason, 500, Internal Server Error ---> System.Net.Http.HttpRequestException: net_http_message_not_success_statuscode_reason, 500, Internal Server Error at System.Net.Http.HttpResponseMessage.EnsureSuccessStatusCode() at CodeSpark.Apps.Common.Net.HttpClients.OneHttpClient.ExecuteRequest(CancellationToken cancellationToken, String url, String httpMethod, String requestContent, String authorizationHeader, Dictionary`2 requestHeaders) Exception_EndOfInnerExceptionStack at CodeSpark.Apps.Common.Net.HttpClients.OneHttpClient.ExecuteRequest(CancellationToken cancellationToken, String url, String httpMethod, String requestContent, String authorizationHeader, Dictionary`2 requestHeaders) at CodeSpark.Apps.Common.Net.WebRequests.WebRequest.ExecuteRaw(OneHttpClientFactory httpClientFactory, CancellationToken cancellationToken, XHttpClientRequirements httpClientRequirements, String url, String httpMethod, String mediaType, String requestData, String authorizationHeader,