From the JRI-POLAND'S e-newsletter:

More than three months after suffering an external hacking attack, the Polish State Archives (PSA) has spent several months solidifying their internet security. Today, the PSA website has returned to its normal online operations. As of this writing - the JRI-Poland search results “Click to View” feature can once again retrieve images of more than 2.7 million documents from the PSA website once again!

To access the Polish State Archives web site, Go to https://www.nac.gov.pl/en/ for the English section of the web site. (Not all records are available in English. If you can read Polish, go to https://www.nac.gov.pl/.)