In T261598#6445687, @Aklapper wrote:

Who can I address to help me save my translation project?

See the link in the bottom right corner of the translation page which goes to https://www.mediawiki.org/wiki/Talk:Content_translation

For this software bug report here in Wikimedia Phabricator, if you go to https://pl.wikipedia.org/wiki/Special:ContentTranslation?page=Registrar+(museum)&from=en&to=pl&targettitle=Registrar+(museum) (I guess that is what we are talking about), what exactly is displayed? Could you attach a screenshot, please?

For me that page says Błąd krytyczny: ładowanie tłumacza treści nie powiodło się przez błąd wewnętrzny. / Critical error: Content translation failed to load due to internal error. That is a problem, but is that the same problem that you see? I don't think so?

The page also says To jest tłumaczenie w toku autorstwa Żorż. Upewnij się, że uzgodniłeś zmianę z użytkownikiem, który przetłumaczył obecną wersję. Which is not a problem but expected, because you are already working on this. :)

Also, which web browser and web browser version do you use?

Are there any errors in the console of the developer tools of your web browser?

I see info that the original english site is impossible to find [of course the site exists, is on the same address]
I am using Chrome, but tested it also on IE, Firefox, Opera - same result.

In T261598#6433927, @Aklapper wrote:

Hi @George, I assume you are using ContentTranslation? I'm asking for more info to find out which codebase this problem is about.

Source: https://en.wikipedia.org/wiki/Registrar_(museum)
My translation page: https://pl.wikipedia.org/wiki/Special:ContentTranslation?title=Special:ContentTranslation&campaign=contributionsmenu&to=pl&page=Registrar+%28museum%29&from=en&targettitle=Inwentaryzator+muzealny

Im sorry, this is my first bug report, and trust me, the info on reporting a bug is not clear.