I've experienced the same problem. Here is the relevant ActivityLog.xml entry:

Can confirm this is happening to me as well. ActivityLog says the same thing as above :
Extension System.NullReferenceException: Object reference not set to an instance of an object. at YoderZone.Extensions.Remarker.RemarkTagger.GetTags(NormalizedSnapshotSpanCollection spans) at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.d__39.MoveNext() --- End of stack trace from previous location where exception was thrown --- at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)

@seangifford or @stefangavrilasengage
My activitylog.xml didn't contain the crash, can one of you add a comment and upload your entire activitylog.xml to the linked VS bug report? Additional info was requested by Microsoft there.

Repro Steps:

1. Install Remarker extension, version 1.4.
2. Create an ASP .Net web application.
3. Close VS and Reopen VS.
4. Open a file or a solution ,such as c# console application.

Expected:
a c# console app will be create successfully.

Actually:
a c# console app not be create successfully and vs crash.

I can confirm the same issue. Any progress figuring out a solution? I miss it!

I uninstalled & reinstalled a previous version to make this work and it does the job (currently using 15.7.6).

I confirm it too

Any update on this, and does it crash on 15.9.x?

I just updated to 15.9.4 and tried again, but the issue still remains

https://github.com/negrutiu/remarker

Thanks for this link @tgaldi and to @negrutiu for the work.

It feels such a shame to have to switch from a package on the VS marketplace to downloading a vsix from github but given that @jgyo has been so silent on this critical bug I guess it's the only option.

I haven't tried it out yet and will review the commits to make sure that one of the very sensible looking commits doesn't include a bitcoin mining bot or whatever, but I assume you can vouch that it works @tgaldi?

Hey guys, I didn't know about this thread...
@kirbatious : you're welcome to review my commits. I promise you there's no miner or anything malicious hidden there :)
Enjoy Remarker!