Probably a build issue.
/home/helixbot/work/B3DB0956/p/dotnet-cli/sdk/6.0.100-preview.2.21155.3/MSBuild.dll -maxcpucount -verbosity:m /bl:/home/helixbot/work/B3DB0956/w/B82A09B2/uploads/xharness-output/AOTBuild.binlog /p:RunAOTCompilation=true publish/AOTTestProjectForHelix.proj
AOT'ing 54 assemblies
/home/helixbot/work/B3DB0956/p/build/wasm/WasmApp.targets(137,5): warning : Can not open image UnloadableAssembly.dll [/home/helixbot/work/B3DB0956/w/B82A09B2/e/publish/AOTTestProjectForHelix.proj]
/home/helixbot/work/B3DB0956/p/build/wasm/WasmApp.targets(137,5): error : Precompiling failed for /home/helixbot/work/B3DB0956/w/B82A09B2/e/wasm_build/../publish/UnloadableAssembly.dll: Error: Can not open image UnloadableAssembly.dll [/home/helixbot/work/B3DB0956/w/B82A09B2/e/publish/AOTTestProjectForHelix.proj]
/home/helixbot/work/B3DB0956/p/build/wasm/WasmApp.targets(137,5): error : [/home/helixbot/work/B3DB0956/w/B82A09B2/e/publish/AOTTestProjectForHelix.proj]
/home/helixbot/work/B3DB0956/p/build/wasm/WasmApp.targets(137,5): error : [/home/helixbot/work/B3DB0956/w/B82A09B2/e/publish/AOTTestProjectForHelix.proj]
XHarness artifacts: /home/helixbot/work/B3DB0956/w/B82A09B2/uploads/xharness-output
Probably a build issue.
Log