Github actions sed -i "s/" not escaping properly "//" in url

I have such silly issue that I can't get working. I am using GitHub actions and I want to replace some ulr.
My sed looks like this:
sed -i "s/${{ inputs.original-variable }} for inputs.original-variable i want to use such url: 'wss://mm-websocket.mydomain.com' but every time this is running it is not properly escaping and i do get this error sed: -e expression #1, char 11: unknown option to s' "s/wss://mm-websocket.mydomain.com

I was trying to use const and replace whole const with a string not string itslef, but still did not work for me

Also how i can run my ci job localy will gh run file.yml work?

Edit:
Before sed I have 'wss://mm-websocket.mydomains.com/'
After sed I want to have wss://mm-websocket.mydomain.com

Actual step in .yml file

original-variable: wss://mm-websocket.mydomains.com/
destination-variable: wss://mm-websocket.mydomain.com/
file-path: 'apps/app/src/environments/environment.prod.ts'

actual replace step

run: |
  destinationVariable=${{ inputs.destination-variable }}
  parsedDestinationVariable="${destinationVariable//\//\\/}"
  sed -i "s/${{ inputs.original-variable }}/$parsedDestinationVariable/" "${{ inputs.file-path }}"

When using sed for URLs, using forward slashes / could cause problems, try using a different deliminator like @

sed -i "s@${{ inputs.original-variable }}@$parsedDestinationVariable@" "${{ inputs.file-path }}"