I have some theta tokens that I staked on a Guardian node, some time ago. Now I am wanting to get them unstaked? except I am unsuccessful.

So I log into thetatoken.org access my wallet through my TREZOR, go through the steps to unstake (yes I know it takes approximately 3 days to unstake Theta tokens). So I attempt to unstake them, but each time it comes up as a "failed to fetch" transaction?

such as this...

https://imgur.com/a/Vxv21aj

Any ideas what I am doing wrong?