double post urls with symbols

Hello, everybody.
My site is artti.ru

Search engines GOOGLE and YANDEX show me a lot of 404 pages. Their urls are doubled and have extra characters, for example:

https://artti.ru/style/kak-tantsuyut-paryi/http%3A%2F%2Fartti.ru%2Fstyle%2Fkak-tantsuyut-paryi%2F
(real existing url is https://artti.ru/style/kak-tantsuyut-paryi)

The amount of such urls increases after adding new posts. So I have normal urls in the search (104 now) and such double urls excluded from the search (110 now).

My permalink structure is: https://artti.ru/%category%/%postname%/
My theme is ColorMag Pro (Premium)
My WordPress version is 4.7
My .htaccess file consists of:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

I have these plugins, installed on my WordPress site:

All in one Favicon
All In One SEO Pack
Animate It!
ARVE Advanced Responsive Video Embedder
Attachment Pages Redirect
Automatic Featured Images from YouTube / Vimeo
Broken Link Checker
Category Posts Widget
Cyr-To-Lat
deAdblocker
Easy Google Fonts
Facebook Open Graph, Google+ and Twitter Card Tags
Google Analytics Dashboard для WP
iThemes Security
Jetpack от WordPress.com
JL Login Logo
Link View
Menu Icons
New Google Plus Badge Widget
P3 (Plugin Performance Profiler)
SiteOrigin Бандл Виджетов
TinyMCE Advanced
UpdraftPlus — Backup/Restore
UpToLike Social Share Buttons
Video Thumbnails
VKontakte API
Widget Options
WordPress Popular Posts
WP Content Copy Protection & No Right Click
WP SVG Icons
WP-PageNavi
Yandex.Metrika
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