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If you don’t have .htaccess, you can create it by logging in to your the control panel of your host and going to the file manager.
Here’s what the contents of your .htaccess should be.

ÇáãÔßáÉ:

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ÇáÍá:
Çä ÇáãáÝ htaccess ÝÇÑÛ áÇ íÍÊæì Úáì åÐÇ ÇáßæÏ, ÝÖÚ åÐÇ ÈÏÇÎáå


ßæÏ:
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]

# add a trailing slash to /wp-admin
RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L]
RewriteRule . index.php [L]

https://codex.wordpress.org/htaccess