What is going on with the Harvest Power-Up?

Question

I've been using this power-up for years, but all of a sudden when I click the power-up button on any of my cards, it just prompts me to sign in (I am already signed in). Then when I click continue, it asks me to select my name, so I do. Then it takes me 
right back to the sign-in prompt. Again, I am already signed in.

:-/

Lindsey Ross · Answer

Yes, this worked for me too. Thank you so much!

Richard_zdpele · Answer

Can confirm that this is the solution until Firefox does something about it.

Lindsey Ross · Answer

Very annoying indeed! I rely on this feature every time I start/stop a new task and it's driving me crazy!