Currently having this issue. Just started in March. Had my unit since 2017. I've contacted support so I hope they are in touch soon.
Same with mine. I got mine second-hand so I don't know when it was purchased but most likely the warranty has expired anyway. It was working fine for couple years until March. Luckily I searched this forum and found this thread, thank you OP. I think I am just gonna swap the battery by myself