Are you on a school network?
If you are working on a computer that is connected to school wifi this problem may be a result of the school network blocking something Seneca needs to work.

This link will help a school IT technician unblock Seneca:
https://help.senecalearning.com/it-troubleshooting/how-do-i-unblock-seneca-on-my-school-network

Especially important, get your IT technician to whitelist:

I have tried unblocking this but I still get an error
If the above doesn't solve the issue please get in touch using the chat to the bottom right of this page. To help us, please let us know the error you are getting using:

https://help.senecalearning.com/it-troubleshooting/inspecting-the-console

I am not on a school network and still get a problem

Please try using a different browser. If it works on a different browser, please let us know the name of the browser and the version number so we can get it fixed.

Simply search for another help article using the search at the top of this page.