This is related to the older thread:
Wagmi error in tutorial Build A Web3 DEX | FULL COURSE | React, Node, Moralis, 1Inch
It is closed, but I ran into the same problem.
It is happening when I am at the final step
PS E:_a\apps\sbs\write> npm run start
The error is:
Failed to compile.
./node_modules/wagmi/dist/index.js
AssertionError [ERR_ASSERTION]: Expected values to be strictly equal:
'??' !== '||'
at Array.forEach (<anonymous>)
This only happened recently when after a hardware error I had to reinstall the project, it worked before.