Can't check in changes to TFS

I am having issues trying to check in changes to TFS hosted on Visual Studio Online. Started just last week. I am running Visual Studio Professional 2017 version 15.5.2.

When I try to check in changes, I get this error:

C:\My\Workspace\Path\Project\File.cs: Download of item $/Workspace/Path/Project/file.cs was not completed. Perform a get operation to correct.

Okay, whatever. Sounds simple enough. So I go to the problem file and do a Get Latest Version. When I do that, I then get this error:

Source Control Explorer  
The network path was not found.

The output in the Output window after attempting the get is this:

Conflict C:\...\...\...\...\...\Program.cs - Unable to perform the get operation because you have a conflicting edit
Automatically resolved conflict: edit: C:\...\...\...\...\...\Program.cs as TakeTheirs
The network path was not found.

I have read a number of posts, and tried a number of things. None have fixed the issue. Things I have tried...

Delete the TFS cached under AppData. Did nothing to help.
Disconnect VS from the TFS project, then delete the hidden $tf folder under my local workspace and then reconnect VS to the team project and re-get everything. The initial re-gets all worked. But once I made some changes to a project and then tried to check it in, it started with these errors again.

Anyone have any other ideas? The next step I see in my future is having to uninstall and reinstall visual studio, but I'm REALLY trying to avoid that.

So, the solution is Deleteing and recreating the workspace.

You will meet similar issues when a workspace is messed up.

Generally, you can try below item to fix such an issue:

Disconnect any instance, close VS, then delete the cache folder located at: e.g. %localappdata%\Microsoft\Team Foundation\7.0\Cache, then restart the VS, connect to TFS/VSTS again.
Remap the workspace to a new folder
Delete the old workspace and create a new one, map it.