Here are instructions to reflash the Librem 5 with a new image. I suggest backing up any important files first before doing so.
Here is a high-level overview: Download, verify, and install the PureOS 10.3 image on a USB drive using disk-writing software such as balenaEtcher. Boot into the PureOS USB live image. Follow the instructions listed by Irvine Wade above this post, or alternatively this one below. https://developer.puri.sm/Librem5/Development_Environment/Phone/Troubleshooting/Reflashing_the_Phone.html Remember to install git first before mirroring the repository. Also note the command sudo apt build-…