Empty windows after update to 2.1.7

Hello,

I just did an upgrade of my WordPress site (WP and all plugins), and after testing all the pdf windows of pages with the PDFJS shortcode were empty. No errors, the PDFJS border was vissible, with buttonbar a.s.o., just no contenet.
I upgraded from version 1.4.6 to 2.1.7 (WP went from 5.2.3 to 6.0.1).
I don’t update very often, and always first in a local XAMPP environment, and local in XAMPP the new PDFJS version was working properly. So the differneces with production site are http/https and localhost versus www…
I disabled cache, I tried the beta checkbox at the bottom of Settings.
URL’s and content haven’t changed and when copy pasting the url found in browser Developer mode where the iframe element is (src=”htttps://www…..pdf) in a new browser window the pdf appeared, so no URL issues.

Fortunately I keep old versions, so I uninstalled version 2.1.7 directly in production and installed the old 1.4.6 version and all was working again.

Just thought you wanted to know.
If I need tot do some testing, let me know.
Kind regards,
Han