Answer: It is possible that the issue you are facing with loading/interacting with Yearn vaults on Optimism is due to the RPC settings. To ensure that your connection is properly configured, Optimism recommends creating a free Alchemy account, which can be done by following the instructions provided in the link shared in the answer above. Once you have created your account, you can use the provided settings to configure your connection and try loading/interacting with Yearn vaults on Optimism again. If you are still having issues, you can reach out to the Optimism team for further assistance.