Encounter ArgumentNullException every time the project is opened

[laicasaane]

Build version 6087.
Here is the log

<entry>
<record>854</record>
<time>2021/01/29 17:57:47.670</time>
<type>Error</type>
<source>Editor or Editor Extension</source>
<description>
    System.ArgumentNullException: Value cannot be null.&#x000D;&#x000A;Parameter name: tag&#x000D;&#x000A;
        at Microsoft.VisualStudio.Text.Tagging.TagSpan`1..ctor(SnapshotSpan span, T tag)&#x000D;&#x000A;
        at Codist.Taggers.CSharpTagger.CreateClassificationSpan(ITextSnapshot snapshotSpan, TextSpan span, ClassificationTag tag) in D:\Codes\Open Source Projects\Codist\Codist\Taggers\CSharpTagger.cs:line 610&#x000D;&#x000A;
        at Codist.Taggers.CSharpTagger.ClassifyPunctuation(TextSpan itemSpan, ITextSnapshot snapshot, SemanticModel semanticModel, CompilationUnitSyntax unitCompilation) in D:\Codes\Open Source Projects\Codist\Codist\Taggers\CSharpTagger.cs:line 345&#x000D;&#x000A;
        at Codist.Taggers.CSharpTagger.&lt;GetTags&gt;d__5.MoveNext() in D:\Codes\Open Source Projects\Codist\Codist\Taggers\CSharpTagger.cs:line 205&#x000D;&#x000A;
        at Microsoft.VisualStudio.Text.Tagging.Implementation.TagAggregator`1.&lt;GetTagsForBuffer&gt;d__47.MoveNext()&#x000D;&#x000A;
    --- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;
    at Microsoft.VisualStudio.Telemetry.WindowsErrorReporting.WatsonReport.GetClrWatsonExceptionInfo(Exception exceptionObject)
</description>
</entry>

[wmjordan]

Please download the new beta and see whether your problem persists.