Thank you for joining this conversation; not able to use the Ignite TV app is quite disappointing. I appreciate your posting the error message, and thanks for trying the suggested fixes. I hope you are staying well and safe!
Do you use the Rogers Ignite WiFi Hub app to manage your home network? If yes, can you check if the Protected Browsing feature turned On? If it is On, please toggle it Off and then try accessing the Ignite TV app.