Error in exFAT hard disk

I have installed msw in a NTFS computer, in a directory called My_wikis and it runs OK. When I copy the My_wikis to another NTFS computer it appears an error (because it is under a proxy):
Error: Cannot find package 'D:\My_wikis\node_modules\prisma-client\index.js' imported from D:\My_wikis\node_modules\@tiddlywiki\mws\dist\mws.js

so I have to install prisma again:

npm install @prisma/client
npm install --save-dev prisma

And it runs OK in the new computer.
Then I copy the My_wikis directory to another computer exFAT computer. When I run the
npm install @prisma/client

It appears an error:

npm error EISDIR: illegal operation on a directory, symlink 'E:\My_wikis\node_modules\@tiddlywiki\mws\prisma\client' -> 'E:\My_wikis\node_modules\prisma-client'

Why I have to install prisma each time I copy My_wikis to other NTFS disk?
Why it does not run in exFAT units?

I want to have a 'medium-portable' mws installation.

Start by reproducing the copy-and-install sequence described for My_wikis on NTFS and exFAT, using the npm commands and the paths in node_modules. Read node_modules/@tiddlywiki/mws/dist/mws.js and inspect the reported prisma-client symlink and EISDIR error; done means the cause and a supported portable-install behavior are documented or fixed.