Downloaded the Plugin from his video How I Automated My Finances with Claude AI and tried installing in Cowork and I have the $20 subscription and it said "However, I don't have a tool to sideload an arbitrary uploaded .plugin file into Cowork — my plugin tools only search/install from Anthropic's plugin marketplace. Installing a plugin from a file like this needs to happen through the Cowork app itself (plugin/marketplace settings), not through me" I dropped it in like he said and that's the message it gave me. Ideas?