Updating to the latest Pact Standalone Core (1.19.0), which fixes a consumer mock provider problem on Linux when using a consumer or provider name that includes a space. See pact-foundation/pact-ruby-standalone#7
Install-Package PactNet.Windows -Version 2.0.21
or
Install-Package PactNet.OSX -Version 2.0.21
or
Install-Package PactNet.Linux.x86 -Version 2.0.21
or
Install-Package PactNet.Linux.x64 -Version 2.0.21