Internal 500 server error

hi people, I’ve read a few post on here from 5/6 years ago and didn’t know if it was still useful or not, today i just started getting a server 500 error, i tried to call my host 1and1 a bunch of times and no pick up, i also read that it was a htaccess problem my current htaccess file is listed below but I’m not sure what I’m looking at exactly

any help would be so greatly appriaicated

# BEGIN WpFastestCache
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
AddDefaultCharset UTF-8
RewriteCond %{HTTP_HOST} ^www.premiervacationsflorida.com [NC]
RewriteRule ^(.*)$ http\:\/\/premiervacationsflorida\.com\/$1 [R=301,L]
RewriteCond %{REQUEST_METHOD} !POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/all/$1/index.html -f [or]
RewriteCond /homepages/22/d476388873/htdocs/Premierfloridavacations/wordpress/wp-content/cache/all/$1/index.html -f
RewriteRule ^(.*) "/wp-content/cache/all/$1/index.html" [L]
##### mobile #####
RewriteCond %{REQUEST_METHOD} !POST
RewriteCond %{QUERY_STRING} !.*=.*
RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/wpfc-mobile-cache/$1/index.html -f [or]
RewriteCond /homepages/22/d476388873/htdocs/Premierfloridavacations/wordpress/wp-content/cache/wpfc-mobile-cache/$1/index.html -f
RewriteRule ^(.*) "/wp-content/cache/wpfc-mobile-cache/$1/index.html" [L]
##### mobile #####
</IfModule>
<FilesMatch "\.(html|htm)$">
FileETag None
<ifModule mod_headers.c>
Header unset ETag
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header set Expires "Mon, 29 Oct 1923 20:30:00 GMT"
</ifModule>
</FilesMatch>
# END WpFastestCache
# BEGIN GzipWpFastestCache
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-font-ttf
AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
AddOutputFilterByType DEFLATE font/opentype font/ttf font/eot font/otf
</IfModule>
# END GzipWpFastestCache
# 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
 AddOutputFilterByType DEFLATE text/html text/plain text/xml text/x-js text/javascript text/cssAddOutputFilterByType DEFLATE application/xml application/xhtml+xml application/x-javascript application/javascript application/json ## EXPIRES CACHING ##

<IfModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_item_exclude file \.(gz|zip|xsl)$
mod_gzip_item_include mime ^text/html$
mod_gzip_item_include mime ^text/plain$
mod_gzip_item_include mime ^image/x-icon$
mod_gzip_item_include mime ^httpd/unix-directory$
mod_gzip_item_include mime ^text/javascript$
mod_gzip_item_include mime ^application/javascript$
mod_gzip_item_include mime ^application/x-javascript$
mod_gzip_item_include mime ^text/x-js$
mod_gzip_item_include mime ^text/ecmascript$
mod_gzip_item_include mime ^application/ecmascript$
mod_gzip_item_include mime ^text/vbscript$
mod_gzip_item_include mime ^text/fluffscript$
mod_gzip_item_include mime ^text/css$
</IfModule>

ExpiresActive On
ExpiresByType image/jpg "access 1 year"
ExpiresByType image/jpeg "access 1 year"
ExpiresByType image/gif "access 1 year"
ExpiresByType image/png "access 1 year"
ExpiresByType text/css "access 1 month"
ExpiresByType application/pdf "access 1 month"
ExpiresByType text/x-javascript "access 1 month"
ExpiresByType application/x-shockwave-flash "access 1 month"
ExpiresByType image/x-icon "access 1 year"
ExpiresDefault "access 2 days"

## EXPIRES CACHING ##