Glass as a Spectrum Quest Problem:

Hello, my account name is legendbladeanirudh, and I have a problem while doing the Glass as a Spectrum Quest. While conducting the lab, as I feed Meatlug the Cobalt and the Sandstone, it just keeps loading and loading endlessly, and I have tried a number of things, from restarting my PC as well as restarting the game, but this issue is still there, and it specifically only affects the cobalt, not any other stone like chromite or maganese. PLEASE HELP!!