Plugin crahed site, theme and other functions

this seems to work with version 4.5.1
add_filter( ‘webpc_htaccess_mod_rewrite_inherit’, ‘__return_false’ );

no upgrade was done. the version was 4.5… after a few days the site crashed.
here is the htacess. but i have installed another plugin for converting

## BEGIN EXPIRES CACHING - JCH OPTIMIZE ##
<IfModule mod_expires.c>
	ExpiresActive on

	# Your document html
	ExpiresByType text/html "access plus 0 seconds"

	# Data
	ExpiresByType text/xml "access plus 0 seconds"
	ExpiresByType application/xml "access plus 0 seconds"
	ExpiresByType application/json "access plus 0 seconds"

	# Feed
	ExpiresByType application/rss+xml "access plus 1 hour"
	ExpiresByType application/atom+xml "access plus 1 hour"

	# Favicon (cannot be renamed)
	ExpiresByType image/x-icon "access plus 1 week"

	# Media: images, video, audio
	ExpiresByType image/gif "access plus 1 year"
	ExpiresByType image/png "access plus 1 year"
	ExpiresByType image/jpg "access plus 1 year"
	ExpiresByType image/jpeg "access plus 1 year"
	ExpiresByType image/webp "access plus 1 year"
	ExpiresByType audio/ogg "access plus 1 year"
	ExpiresByType video/ogg "access plus 1 year"
	ExpiresByType video/mp4 "access plus 1 year"
	ExpiresByType video/webm "access plus 1 year"

	# HTC files (css3pie)
	ExpiresByType text/x-component "access plus 1 year"

	# Webfonts
	ExpiresByType application/font-ttf "access plus 1 year"
	ExpiresByType font/* "access plus 1 year"
	ExpiresByType application/font-woff "access plus 1 year"
	ExpiresByType application/font-woff2 "access plus 1 year"
	ExpiresByType image/svg+xml "access plus 1 year"
	ExpiresByType application/vnd.ms-fontobject "access plus 1 year"

	# CSS and JavaScript
	ExpiresByType text/css "access plus 1 year"
	ExpiresByType type/javascript "access plus 1 year"
	ExpiresByType application/javascript "access plus 1 year"

	<IfModule mod_headers.c>
		Header append Cache-Control "public"
		<FilesMatch ".(js|css|xml|gz|html)$">
			Header append Vary: Accept-Encoding
		</FilesMatch>
	</IfModule>

</IfModule>

<IfModule mod_brotli.c>
	<IfModule mod_filter.c>
		AddOutputFilterByType BROTLI_COMPRESS text/html text/xml text/plain 
		AddOutputFilterByType BROTLI_COMPRESS application/rss+xml application/xml application/xhtml+xml 
		AddOutputFilterByType BROTLI_COMPRESS text/css 
		AddOutputFilterByType BROTLI_COMPRESS text/javascript application/javascript application/x-javascript 
		AddOutputFilterByType BROTLI_COMPRESS image/x-icon image/svg+xml
		AddOutputFilterByType BROTLI_COMPRESS application/rss+xml
		AddOutputFilterByType BROTLI_COMPRESS application/font application/font-truetype application/font-ttf
		AddOutputFilterByType BROTLI_COMPRESS application/font-otf application/font-opentype
		AddOutputFilterByType BROTLI_COMPRESS application/font-woff application/font-woff2
		AddOutputFilterByType BROTLI_COMPRESS application/vnd.ms-fontobject
		AddOutputFilterByType BROTLI_COMPRESS font/ttf font/otf font/opentype font/woff font/woff2
	</IfModule>
</IfModule>

<IfModule mod_deflate.c>
	<IfModule mod_filter.c>
		AddOutputFilterByType DEFLATE text/html text/xml text/plain 
		AddOutputFilterByType DEFLATE application/rss+xml application/xml application/xhtml+xml 
		AddOutputFilterByType DEFLATE text/css 
		AddOutputFilterByType DEFLATE text/javascript application/javascript application/x-javascript 
		AddOutputFilterByType DEFLATE image/x-icon image/svg+xml
		AddOutputFilterByType DEFLATE application/rss+xml
		AddOutputFilterByType DEFLATE application/font application/font-truetype application/font-ttf
		AddOutputFilterByType DEFLATE application/font-otf application/font-opentype
		AddOutputFilterByType DEFLATE application/font-woff application/font-woff2
		AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
		AddOutputFilterByType DEFLATE font/ttf font/otf font/opentype font/woff font/woff2
	</IfModule>
</IfModule>

# Don't compress files with extension .gz or .br
<IfModule mod_rewrite.c>
	RewriteRule "\.(gz|br)$" "-" [E=no-gzip:1,E=no-brotli:1]
</IfModule>

<IfModule !mod_rewrite.c>
	<IfModule mod_setenvif.c>
		SetEnvIfNoCase Request_URI \.(gz|br)$ no-gzip no-brotli
	</IfModule>
</IfModule>
## END EXPIRES CACHING - JCH OPTIMIZE ##

AddType application/x-httpd-php74 .php

# BEGIN WordPress
# Die Anweisungen (Zeilen) zwischen „BEGIN WordPress“ und „END WordPress“ sind
# dynamisch generiert und sollten nur über WordPress-Filter geändert werden.
# Alle Änderungen an den Anweisungen zwischen diesen Markierungen werden überschrieben.

# BEGIN Images to WebP
<IfModule mod_mime.c>
AddType image/webp .webp
</IfModule>
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTP_ACCEPT} image/webp
RewriteCond %{REQUEST_FILENAME} "/"
RewriteCond %{REQUEST_FILENAME} "\.(jpg|jpeg|gif|png)$"
RewriteCond %{REQUEST_FILENAME}\.webp -f
RewriteRule ^(.+)$ $1\.webp [NC,T=image/webp,E=webp,L]
</IfModule>
# END Images to WebP

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress