You might try clearing out (or temporarily moving) the user template directories as part of a clean reinstall. This is a followup on the ideas in the other thread you posted into. I don’t know where the tree is on Linux. Or reach out to tech support.
PC Win 11 Pro, 64GB ram; NVidia 572.83; dual monitor; RTX 3080 (10GB); auto/CUDA processing mode; SSD cache, separate SSD for data; Davinci Studio