MacOS Tahoe 26.2 problem with Safari, only when on Dutch language, to access local IP address website with "invalid" certificate.

Sir you are an absolute hero! This is the solution for me.

was wondering why the internet wasn't exploding with this private cert issue but apparently it is restricted to dutch (certain languages?) Now I can use my favorite browser again! (so many devices/installs use/create private certificates)

roos-aid wrote:

When I have my MacOS Tahoe 26.2 in Dutch language, Safari blocks local IPV4 based websites (eg. https://10.0.0.100:8123/ due to mismatched Certificate. Safari shows the (Dutch version of) This Connection Is Not Private, with an option Show Details. However Show Details does not respond.

If I switch to English language , I and restart Safari, the Show Details screen does work and gives the option to show Certificate and allow to continue.

This behaviour is since Tahoe 26.2 .

All other browser (Firefox, Chrome) do not have this issue.

This strongly indicates:A broken or mismatched localization string / UI binding in Safari’s Dutch security dialog in 26.2

If this is so, suggest contacting Apple and report this issue

Start now and open an Apple Support Ticket as they are Apple Employees who deal will these types of issues . 

 Product Feedback - and make it known to Apple regarding this ongoing issue