Canon TS6420a New/Bad Security Certificate Error When Trying To Print From Chromebook

[LaylatheFHorn]

Two weeks prior to this, I reset my Canon TS6420a printer due to it not printing double-sided while setting it to do so on both the printer and device. Tonight I tried to reconnect it to wifi through the Canon PRINT app on a Chromebook. While it would not queue the print from the Chromebook, from my phone it said that it tried to present a new security certificate. Is this normal, or is it a concern?

For reference, I am trying to print sheet music from Chrome OS and from a Samsung Galaxy phone. Below is a screenshot:

screenshot