I have a Summer 2020 Rize Leisure and the torque sensor started failing after a few months (about 1200kms). In my case, the sensor started to become erratic, working occasionally, and eventually only the throttle worked. I live in Sechelt, but managed to ride my bike into Vancouver to have it repaired. I had emailed them a video and also brought my Leisure to their Richmond store. They agreed to replace it, but they could not do the installation, as they didn't employ any service personnel. Instead, I took the bike and the new torque sensor they gave to an e-bike store in Kits, where they swapped out the torque sensor within 24 hours. Rize promptly reimbursed me for the labour cost ($50) via e-transfer after I emailed them a copy of the receipt. This is the same torque sensor as the attached picture in your above post. Note that this model does not have Isis splines as someone had suggested.
A side note, the handlebar mounted push pad control thingee was also replace by Rize on my Lesure when I was there, as it was beginning to malfunction. Since it was simple to replace, they did it for me on the spot.