COMException during symbol lookup when using OpenStackViewer and MutableTraceEventStackSource

[ara-ayvazyan]

When opening a stack view via OpenStackViewer with MutableTraceEventStackSource from an extension, symbols are loaded and shown as expected.
However, the following exception occurs when trying to open any other view, e.g., built-in "CPU Stacks", and no symbols are shown.

An exception occurred during symbol lookup.  Continuing...
Exception: System.Runtime.InteropServices.COMException (0x80040155): Interface not registered (Exception from HRESULT: 0x80040155)
   at Dia2Lib.DiaLoader.IClassFactory.CreateInstance(Object aggregator, Guid& refiid, Object& createdObject)
   at Dia2Lib.DiaLoader.GetDiaSourceObject()
   at Microsoft.Diagnostics.Symbols.NativeSymbolModule..ctor(SymbolReader reader, String pdbFilePath, Action`1 loadData)
   at Microsoft.Diagnostics.Symbols.SymbolReader.OpenSymbolFile(String pdbFilePath)
   at Microsoft.Diagnostics.Tracing.Etlx.TraceCodeAddresses.OpenPdbForModuleFile(SymbolReader symReader, TraceModuleFile moduleFile)
   at Microsoft.Diagnostics.Tracing.Etlx.TraceCodeAddresses.LookupSymbolsForModule(SymbolReader reader, TraceModuleFile moduleFile, IEnumerator`1 codeAddressIndexCursor, Boolean enumerateAll, Int32& totalAddressCount)
   at Microsoft.Diagnostics.Tracing.Etlx.TraceCodeAddresses.LookupSymbolsForModule(SymbolReader reader, TraceModuleFile file)
Completed: Looking up high importance PDBs that are locally cached   (Elapsed Time: 0.079 sec)

Same happens when opening them in the reverse order. Essentially, the first view has no issues with loading symbols, while the second one fails with the above exception.