You are probably hitting a similar issue as described here:
https://gitlab.e.foundation/e/backlog/-/issues/3377
Trouble is, your recovery image is from dev branch since the installation (0.17 is probably the first version you’ve flashed on the 'set), and can’t verify the signature of the downloaded image from OTA.
I’ve fixed it by flashing the 0.18 recovery image from the stable branch. If you think the same issue affects you do the following:
Download https://images.ecloud.global/stable/GS290/recovery-e-0.18-q-20210827132306-stable-GS290.img and verify the checksum https://images.ecloud.global/stable/GS290/recovery-e-0.18-q-20210827132306-stable-GS290.img.sha256sum
Enable developer options, enable usb debugging, connect GS290 via usb cable and run:
adb reboot bootloader
fastboot flash recovery recovery-e-0.18-q-20210827132306-stable-GS290.img
fastboot reboot
After that run the OTA again.
But you could wait for someone at /e/ to confirm the procedure.
Best of luck…
PS. I’m asuming you’re on the stable branch, if not you should download recovery for the dev branch, but I’m not sure what’s the correct link, I’ve guessed the stable one from previous naming conventions 