My portal user cannot see its own quote properly.

When opening the quote, as a portal user, I am getting this:

document type: res.currency, Operation: read

Only the header and footer of the quote can bee seen in portal option.

Meanwhile in website quotation option, the lines can be seen but not the prices.

I already went to configuration/groups portal group, and added read permissions to res.currency without result. I have already tested to add many more things, trying to allow portal group to have more rights, without result. The exception is always the same.

Any idea please?