Thanks for reaching out. Let's check on this further.
A few questions: What type of Chromecast device do you have? What's the LED light status in your Chromecast? How far is your Chromecast from the Wi-Fi router?
Give the steps a try:
Just checking in to make sure that you've seen my response. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again. Feel free to start a new thread and we'll be happy to help.