This looks like your n8n cloud instance is experiencing performance issues or has become unresponsive. Here are some immediate steps to try:
• **Wait and refresh**: Give it 5-10 minutes, then try refreshing your browser or accessing your instance from a new browser tab
• **Clear browser cache**: Clear your browser’s cache and cookies for the n8n domain, then try logging in again
• **Contact n8n support**: Since this is a cloud instance, reach out to n8n support through their help center or community - they can restart your instance if needed
Based on similar issues reported on [github.com](entire workflow is stuck in the queue · Issue #23841 · n8n-io/n8n · GitHub) and the [n8n community](Memory leaks with the new n8n updates?), this could be related to memory issues or workflow complexity. If the workflow you activated was particularly large or complex, it might have overwhelmed your cloud instance resources.