Issue: Metabox not showing

Hello, I’m having problems with RankMath (free) on a WordPress website. In it, I use the classic editor (I disabled the block editor) and until a few days ago, everything worked normally, however, recently, the RankMath metabox simply stopped being displayed on the page editing screen.

I’ve already followed several tutorials and guidance on support pages, in the “Titles and meta” > “Add SEO controls” option, but the problem persists. Furthermore, in the “Screen Options” section, Rank Math is normally activated.

I even tried using a PHP filter to adjust the priority of this metabox, but without success. I don’t know what else to do, so I appreciate any help.

Recently, I noticed this error on console of the editor page:

Uncaught Error: Minified React error #200; visit https://reactjs.org/docs/error-decoder.html?invariant=200 for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
at e.render (react-dom.min.js?ver=18.2.0:10:128498)
at classic.js?ver=1.0.218:1:81569

at /wp-content/plugins/seo-by-rank-math/assets/admin/js/classic.js?ver=1.0.218

Part of code:

{
key: “registerComponents”,
value: function() {
this.components = {},
this.components.linkSuggestions = new Nn,
this.components.primaryTerm = new Kn,
this.components.featuredImage = new Bn,
rankMathAdmin.variableInserter(!1),
setTimeout((function() {
(0,
l.render)((0,
l.createElement)((0,
c.applyFilters)(“rank_math_app”, {})), document.getElementById(“rank-math-metabox-wrapper”))
}
), 1e3)
}

The error is located on this line of the code above:

l.render)((0,

Thanks in advance.