Can you still get into Luci?
If so try renaming the Archer file to the name of the image you used. I take no responsibility for this bricking you router.
Did you see this Forum:
[Archer A7 v5 revert to stock firmware]( There seems to be a complete recovery method from dd-wrt, have a look. There is even a recovery firmware link...
The recovery firmware linked in the dd-wrt wiki is the revision Archer A7(US)_V5_190403, published at 2019-04-15. The TP-Link Website doesn't show this revision anymore, but it's still accessible at it's original download location: https://static.tp-link.com/2019/201904/20190415/Archer%20A7(US)_V5_190403.zip. This is exactly the same as the one proposed by the dd-wrt's wiki.)
Failsafe
https://openwrt.org/docs/guide-user/troubleshooting/failsafe_and_factory_reset