About linux : silvio-packer-for-shared-libray-leads-to-error-ELF-load-command-addressoffset-not-properly-aligned

I’m trying to implement a packer based on silvio infection. The packer works fine for ET_EXEC. However, it failed with “ELF load command address/offset not properly aligned” error for shared library.

Questions

1. what does “ELF load command address/offset not properly aligned” mean ?
2. is silvio infection only works for ET_EXEC ?

silvio infection

1. Learning Linux Binary Analysis
2. https://github.com/youben11/silvio-text-infect