Workflow Error in SharePoint Online

I have been trying to get a clear answer on what has changed in SharePoint Online recently, when being used with SharePoint Designer, but have not gotten any clear answers.  When SharePoint Online was rolled out, and up until as recently as my last job, using SPD was the only way to truly be able to create workflows that actually make a company operate (I'm sorry the canned ones are relatively useless outside of a few scenarios).  SPD was the one way to actually make SharePoint useful in automating business practices.

With the workflows I am creating now, I have run into an issue I am HOPING someone in the community can assist with because I've ultimately been given the runaround by the support team (I'm sorry, but this is how I truly feel because when I've worked with support in the past, they have worked on making things right).  I am simply trying to create a 2013 workflow that users can simply initialize.  No matter what the workflow is set to do, it simply does not work.  I was pointed to a solution for 2010 workflows, where they are exported to Visio and reimported, and this made the 2010 workflows work properly.  The 2013 ones, however, still throw errors like:

RequestorId: 059865bc-a7b3-12c8-0000-000000000000. Details: An unhandled exception occurred during the execution of the workflow instance. Exception details: System.ApplicationException: HTTP 403 {"Transfer-Encoding":["chunked"],"X-SharePointHealthScore":["0"],"X-MSDAVEXT_Error":["917656; Access+denied.+Before+opening+files+in+this+location%2c+you+must+first+browse+to+the+web+site+and+select+the+option+to+login+automatically."],"X-SP-SERVERSTATE":["ReadOnly=0"],"DATASERVICEVERSION":["3.0"],"SPClientServiceRequestDuration":["101"],"SPRequestDuration":["271"],"SPRequestGuid":["059865bc-a7b3-12c8-a694-43e1cc709f26"],"request-id":["059865bc-a7b3-12c8-a694-43e1cc709f26"],"Strict-Transport-Security":["max-age=31536000"],"X-FRAME-OPTIONS":["SAMEORIGIN"],"MicrosoftSharePointTeamServices":["16.0.0.6823"],"X-Content-Type-Options":["nosniff"],"X-MS-InvokeApp":["1; RequireReadOnly"],"Cache-Control":["max-age=0, private"],"Date":["Thu, 07 Sep 2017 09:42:50 GMT"],"P3P":["CP=\"ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE PUR UNI\""],"Server":["Microsoft-IIS\/8.5"],"X-AspNet-Version":["4.0.30319"],"X-Powered-By":["ASP.NET"]} at System.Activities.Statements.Throw.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation) Exception from activity Throw If Sequence Sequence TryCatch Sequence Microsoft.SharePoint.WorkflowServices.Activities.RetryForDurationPolicy HTTPPost_WorkflowInterop_EnableEvents WorkflowInterop DynamicActivity<Guid> Stage 1 Sequence Flowchart Sequence Supply Request WF.WorkflowXaml_d32b0e01_66f3_4239_8264_0774baaafee9

I have never had to do any strange work along with simply publishing the workflow for it to work.  Support states that the settings on the tenant are configured properly.

I hope someone has some insight because I feel like this product has gotten to the point it's borderline unusable because of many of the changes that have been made.