I did several tests. With diacritics, with Doru Piroi, with the adjustment of the translation without diacritics to see where the problem comes from. I am a legal adviser and I do not take the merits of anyone! I just tested it! I seemed abnormal because version 6.1 went without problems with what components I downloaded and installed! I repeat, I do not assume something that I did not realize! I apologize for this question, but my moral probity is unbridled! Thank you

Piroi,
I asked 'What exactly did you customize?'
So, why don't you simply answer my question?
It takes completely unnecessary effort if we need to first start some debugging tools to find out in the end that you changed the powered entry in your language file:

You'd better read the documention BEFORE starting to 'customize' Ossn.
Chapter II d) of https://www.opensource-socialnetwork.org/wiki/view/2132/how-to-translate-ossn
is clearly stating that the powered line must not be changed.

I'll come back with data.
I installed cleanly 6.4. I made the language settings, both on the site and on the profile, profile picture. When I clear the cache and go to view the site, for a fraction of a second the page loads and then it appears as in the photo and it stays that way, no matter how many times I refresh. If I go back from the arrows in the browser, I reach the dashboard, which is still operational. If I log out and refresh to log in again, the page is white, clean, with nothing on it. I have win10pro, and the hosting service is paid. If you can, check here https://retea.cazjuridic.ro I haven't bought SSL yet and you may have security warnings.

Ok. Tomorow i make 3-4 test and rezults post here. Thank you for your answer.

What exactly did you customize?
And please do as advised in
https://www.opensource-socialnetwork.org/wiki/view/1101/how-to-report-a-bug-error-issue