PHP error in Copy Blocks

There is an extensive discussion (unresolved at this time) at https://www.drupal.org/project/drupal/issues/3280848 🐛 Shortcut links without a title cause deprecation notices. Needs work

with regard to the strnatcasecmp() error and I'm not sure if it affects the copy blocks functioning. In fact it doesn't even appear that strnatcasecmp() is even called directly from Copy Blocks. Copy blocks gives me a message that 13 blocks have been copied from w3css theme to solo.

The latest version of Solo (1.0.11) has the following regions listed in its info.yml file (I truncated the list)

regions:
  highlighted: 'Highlighted'
  popup_login_block: 'Popup Login Block'
  fixed_search_block: 'Fixed Search Block'
  header: 'Header'
  primary_sidebar_menu: 'Primary Sidebar Menu'

The latest w3css theme 2.0.14 has the following regions in its info.yml (again truncated);
regions:
header: 'Header'
primary_menu_vertical: 'Primary Menu Vertical'
primary_menu: 'Primary Menu'
welcome_text: 'Welcome Text'
top_first: 'Top First Container'

This is the code that remains after copy_blocks has run. So, I guess that copy blocks does what it says: copy blocks, but doesn't alter the region layout of a solo based theme to match the old layout of w3css? And the recommendation would be to copy your blocks but don't alter the region layout? Just put your blocks in an appropriated (and equivalent) region in the new solo theme?

Hello,

Just put your blocks in an appropriated (and equivalent) region in the new solo theme?

Yes
Copy the blocks along with their configurations to the Solo theme..

Best wishes,
Alaa