Why can't Optimus Flow read external algo (strategy)?

I coded a strategy in Visual Studio and built it with the Quantower extension. I checked, and the strategy went to the appropriate subfolder, but it doesn’t show inside Optimus Flow for backtest/optimize or the strategy manager. I checked the software version, and there are no updates, as I am running version 1.145.9.

I did the same procedure (built in Visual Studio and checked that the solution is in the right subfolder) with Quantower, and the strategy shows up inside the platform. Optimus Flow is behaving differently.