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Hello Venkat Raj,

thank you for your reply.

The only connection that I can draw is that I disabled the plugin and immediately after it got the 500 Server Error.

I read another support thread where somebody asked if it is safe to remove the code of WP-Optimize in the .htaccess file because the plugin was not installed after switching the server/provider which resultet in a 500 server error. I compared the lines with my .htaccess file, trying to figure out what belongs to the plugin and what not.

The troubeling line (“application/manifest+json” \) is included in this section:

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
	
# Compress all output labeled with one of the following media types.
#
# (!) For Apache versions below version 2.3.7 you don't need to
# enable <code>mod_filter</code> and can remove the <code><IfModule mod_filter.c></code>
# and <code></IfModule></code> lines as <code>AddOutputFilterByType</code> is still in
# the core directives.
#
# https://httpd.apache.org/docs/current/mod/mod_filter.html#addoutputfilterbytype
	
	<IfModule mod_filter.c>
		AddOutputFilterByType DEFLATE "application/atom+xml" \
		"application/javascript" \
		"application/json" \
		"application/ld+json" \
		"application/manifest+json" \
		"application/rdf+xml" \
		"application/rss+xml" \
		"application/schema+json" \
		"application/vnd.geo+json" \
		"application/vnd.ms-fontobject" \
		"application/x-font-ttf" \
		"application/x-javascript" \
		"application/x-web-app-manifest+json" \
		"application/xhtml+xml" \
		"application/xml" \
		"font/eot" \
		"font/opentype" \
		"image/bmp" \
		"image/svg+xml" \
		"image/vnd.microsoft.icon" \
		"image/x-icon" \
		"text/cache-manifest" \
		"text/css" \
		"text/html" \
		"text/javascript" \
		"text/plain" \
		"text/vcard" \
		"text/vnd.rim.location.xloc" \
		"text/vtt" \
		"text/x-component" \
		"text/x-cross-domain-policy" \
		"text/xml"
		
	</IfModule>

—–

After forcing a .htaccess rewrite with permalink, save changes the htaccess file was the clean WP-Setup without any extras.

# BEGIN WordPress
# The directives (lines) between "BEGIN WordPress" and "END WordPress" are
# dynamically generated, and should only be modified via WordPress filters.
# Any changes to the directives between these markers will be overwritten.
<IfModule mod_rewrite.c>
	RewriteEngine On
	RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
	RewriteBase /wordpress/
	RewriteRule ^index\.php$ - [L]
	RewriteCond %{REQUEST_FILENAME} !-f
	RewriteCond %{REQUEST_FILENAME} !-d
	RewriteRule . /wordpress/index.php [L]
</IfModule>

# END WordPress

—-

After this I added section for section and line for line in the part, that was causing the issue, until it was clear that the only line causing the problem was:
“application/manifest+json” \

I removed it and now everything seems to work as before.

All I did was trial and error.
If this is actually added through WP-Optimize or not is beyond my capacity to judge.

—-

And all of this still leaves me with my original issue / question that lead me to disable WP-Optimize in the first palce. And that is why parts of my Uncode Site won’t display large font size text sections on mobile that display correctly on desktop?
I found this quote in the support forum as a description for a possible cause:
“The problem is with your Optimization setting, Exclude jquery and jQuery migrate from defer parsing.”

Could it be WP-Optimize that is causing this issue?

Best,
Chris

SOLVED IT:

For those having similar issues…

I disabled the plugin folder by renaming it and made a copy of the .htaccess on the desktop and deleted the .htaccess on the server.
After deleating the .htaccess I could access the dashboard again and rewrite a fresh .htaccess by visiting the dashboard, settings, permalink, save changes.

Then it was just a copy paste back and forth to find out which line was conflicting and causing the 500 server error. It was just one line that had to be commented out.
# “application/manifest+json” \

It wasn’t even the lines that were indicated by the server error log (schema+json). I could leave both lines of this type in the file without a problem.

Hope that helps someone facing similar issues when deactivating “WP-Optimize” and facing a server 500 Error.