Pagesigner not working: What to do at the next dispute?

Hi,
For one of my last trades, arbitration was needed. The arbitrator asked me to make a print screen using pagesigner.
However, pagesigner did not work and with several tries I probably had all the errors that pagesigner can generate:
-“Server sent alert 2,70” error.
-“ERR_BLOCKED_BY_CLIENT” error.
-“Pagesigner is not compatible with this website because the website does not use RSA ciphersuites”

I would like to resolve this problem, just in case a trade goes into dispute/arbitration again and I need to confirm that I send or (not)received fiat.

Is this a known problem with pagesigner? how can I fix it?
Any help would be very much appreciated.

kind regards,

WT

There are mixed feelings about PageSigner as these threads reveal: