A supported task execution handler was not found

If you're getting "A supported task execution handler was not found. The task does not carry an implementation that is compatible with your current operating system 'Windows(X86)'. Contact the task author for more details." error in your build or release pipelines in Azure DevOps, then it's most likely because you have a 32 bit version of the agent installed on 64 bit operating system. When that happens Agent.OSArchitecture build variable is mistakenly set to 32 instead of 64. To fix this issue, just install 64 bit version of the agent instead. That should fix the issue.

Hope this helps.