Actually, there is:

$wgTranslateDisabledTargetLanguages = [
	'*' => [...], // languages disabled in all groups
	'ext-categorytree' => ['sr-el' => 'Translate to sr-latn please.', 'sr-ec' => 'Translate to sr-cyrl please.'],
	'ext-categorytree-api' =>  ['sr-el' => 'Translate to sr-latn please.', 'sr-ec' => 'Translate to sr-cyrl please.'],
	'ext-categorytree-user' => ['sr-el' => 'Translate to sr-latn please.', 'sr-ec' => 'Translate to sr-cyrl please.'],
];

By the way, there is no i18n system for these messages, but I’d probably include both English and Serbian text in these strings to make them easier to understand for Serbian translators.

In T117845#9291616, @Winston_Sung wrote:

In T117845#9290941, @gerritbot wrote:

Change 323667 merged by jenkins-bot:

[mediawiki/extensions/CategoryTree@master] Rename language codes sr-ec and sr-el to sr-cyrl and sr-latn

https://gerrit.wikimedia.org/r/323667

Translation pages have been renamed on translatewiki.net .

Simply magic words in Latin dont work (Example).
Back when magic words where translated on Translatewiki i added Latin ones in page for Cyrillic counterparts (MediaWiki:Sp-translate-data-MagicWords/sr-ec) since Cyrillic is default on srwiki; and Latin ones worked fine

In T321878#8356717, @alexhollender_WMF wrote:

we are planning to update this for Vector 2022. this file on Commons should also be updated: https://commons.wikimedia.org/wiki/File:Wikipedia-logo-v2-sr.svg

Example of the problem

Community notified link, in a few days you will have community consensus

No, and no i didnt mistype password i used copy-paste just to be sure

I used password for sysops account when i tried using delete.py but it reported WrongPass, and i tried agian now and it worked, i gess it is resloved

srwiki, bot account MilicevicBot, sysops account Milicevic01
version.py output

In T50495#526213, @AdHuikeshoven wrote:

This has also been found op nl.wp in another case, that is while adding yourself as reviewer to a page a student is working on in a course. The change is visible in all public logs but in none of the specific logs.

No, at least not on srwiki and enwiki (with Serbian language in settings)

One update: anonymous users are not affected by this problem i.e. edit tools dont disappear

At this time none of my gadgets is turnd on in Посебно:Подешавања, i would need specific instruction how to get key, value and all the other things you said, i am not technically skillful

Yes issue is still happening.