The clicking should be the starting relay.
Are you getting any humming at the starter motor?
Basic electrical checks below.
Check for blown fuse.
I all good, test for voltage at the starter to see if it is a wire break somewhere in the starting circuit.
If no power to the starter, you need to backtrack to the starter relay.
It sounds like the relay is activating (click) so you have to see if you have power in and out (in from 12VDC - power through the relay & out to starter.
I don't want to be pedantic, but not everyone knows how a relay operates, so here goes.
Relay has a magnet coil and switch contacts.
The coil operates when the activating switch is pressed. In this case the starter button.
The switching contacts change state when the coil pulls in (energized by the switch)
The input generally comes from a separate point of power and is turned on and off by the relay operation.
The load of the relay coil is very small and allows a smaller gauge wire to be used for the "pilot" circuit.
The switched contacts are rated at a higher amperage to accommodate the load to be served by the relay.
This scenario eliminates the need to run larger wires all throughout the system.
Sorry about that - I drift off sometimes.
If you have power at the starter and try to start unsuccessfully, the starter should be getting hot as in trying to start against a locked rotor condition. You don't want to do this test for long, because locked rotor currents are multiple times higher than running currents and you will likely pop the fuse if you do or damage some wiring.
It has already been discussed on other topics how the wiring on these is just barely adequate.
Next would be to remove the starter and bench test it with 12VDC power source.
Best to do this in some kind of vise. Careful to protect the starter body from scratches with some kind of pad or heavy cloth. Starters are a bit torquey, and could jump out of your hand and bite you. Also, just touch the terminal momentarily. Starters are not made to run for duration.
If all this works, and you still can't get the motor turning, something is drastically wrong internally. I doubt it though, since you were riding a few weeks ago.
Good luck.
Caseman