Could you clarify, are you on your desktop or mobile platform? Have you troubleshooted your internet connection? (if on desktop, do other websites such as google, facebook, etc, load easily?) Let us know once you've clarified so we can get a better answer for you!
I have been reviewing older questions here in the Canvas Community, and I stumbled upon your question. I wanted to check in with you because I noticed that we have not heard back from you since you first posted this question on November 27, 2018. A day later, Deactivated user replied asking for some clarification from you. Have you had an opportunity to review her reply? Are you still experiencing the flickering screen when accessing your Canvas course(s)? Have you tried reaching out to the folks at the Canvas help desk to see if they might be able to assist you? Could you please come back to this thread to post an update for us? I am hopeful that you (and also Abygail) have been able to get this resolved on your end. However, if you are still looking for some assistance from Community members, please let us know by posting a message below. For now, I am going to mark your question as "Assumed Answered" because we've not heard back from you, but that won't prevent you or others from posting additional questions and/or comments below that are related to this topic. I hope that's alright with you, Yesenia. Looking forward to hearing back from you soon.
Did you ever find a solution to the flickering problem? If so what did you do I've followed the advice on every comment I could find and called my tech support from the school but I still haven't fixed the problem.