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charset downside in wordpress due to nginx config

I transferred a WordPress web site to my server, the earlier webserver was apache, the brand new net server is Nginx, however I made a mistake and obtained the Nginx config file from my previous sources
so this phrase "charset koi8-r;" left within the config file, I eliminated this phrase later

after the motion, I discover an error in WordPress create submit web page, within the console menu

 Uncaught SyntaxError: Invalid common expression: /[б─-б©ц≈ц╥Б──-Б╞©Б╦─-Б╧©]/: Vary out of order in character class
    at Module.<nameless> (analyzer.js?ver=1.0.71.1:1)
    at n (analyzer.js?ver=1.0.71.1:1)
    at analyzer.js?ver=1.0.71.1:1
    at analyzer.js?ver=1.0.71.1:1 

which did not have an effect on my work process and writing posts, till I discover that this error do not let the search engine optimisation plugins panel to be opened and usable, and when I attempt to use search engine optimisation plugins like Yoast search engine optimisation or Rank Math search engine optimisation, this error will likely be additionally within the console:
this error is for Rank Math search engine optimisation and an identical error will likely be displayed for Yoast search engine optimisation

Uncaught ReferenceError: rankMathAnalyzer will not be outlined
    at Object.<nameless> (basic.js?ver=1.0.71.1:1)
    at n (basic.js?ver=1.0.71.1:1)
    at Module.<nameless> (basic.js?ver=1.0.71.1:1)
    at n (basic.js?ver=1.0.71.1:1)
    at basic.js?ver=1.0.71.1:1
    at basic.js?ver=1.0.71.1:1
(nameless) @ basic.js?ver=1.0.71.1:1
n @ basic.js?ver=1.0.71.1:1
(nameless) @ basic.js?ver=1.0.71.1:1
n @ basic.js?ver=1.0.71.1:1
(nameless) @ basic.js?ver=1.0.71.1:1
(nameless) @ basic.js?ver=1.0.71.1:1

this example is not good, as a result of I am unable to use search engine optimisation instruments anymore, after a lot of investigation I discover that after I change my web site URL from www.mysite.com to one thing else like beta.mysite.com the error is not going to be displayed anymore and altering again to default deal with end in error showing once more

I attempted no matter I may, clearing cache and different related stuff, however I’m on a dead-end street now,
I checked the database charset, modified my database model (MariaDB 10.4 and 10.5), modified PHP model (Php 7.4 and eight.0), and many different issues
do you could have any suggestion?