[SOLVED] Opencart 4 - cannot select product category list and editor in product description does not appear

OC Version: 4.0.1.1
Active Extentions: Tmd Public Download & QuickView
Public Download: https://www.opencart.com/index.php?rout ... wani_multi
QuickView: https://www.opencart.com/index.php?rout ... date_added

Added: I removed all the plugins and the problem is still the same.

Administration Panel > Products > Add or Edit Product > Link

When adding or editing any product from the admin panel, I cannot select any category, filter or anything else from the "Link" tab. Even though I typed the category name correctly, it doesn't work. It worked when there was an English language option. However, I deleted English completely. Currently, there is only French language support. Additionally, the editor area in the General tab appears to be broken. Please help me for this. Thanks.

Screenshoots
1: https://ibb.co/6Fgx0vY
2: https://ibb.co/vvz1BJZ

I found the source of the problem.

\' used in some lines in the language files unfortunately conflicts with the ckeditor and datepicker JS files, causing corruption.

But I didn't check exactly which lines were giving problems.

For the admin/language/fr-fr.php and admin/language/catalog/product.php file, I temporarily changed all the lines as follows and it works without any problems.

$_["text_keyword"] = "N\'utilisez pas d\'espaces, remplacez plutôt les espaces par - et assurez-vous que l\'URL du SEO est mondialement unique.";

I used " instead of '. It no longer causes problems when I use \' in translations.

I hope the developers fix this problem.