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If you are using namecheap hoting server and your page builder like Divi not working and you are getting the above mentioned error while saving your page layouts, then you need to do the following thing to solve this issue:
Step 1: Login to the cPanel of your namecheap hosting account
Step 2: Go to public_html folder >find .htaccess file here. Download this file to your local pc as backup. Now copy the below codes and paste it in your .htaccess file. Note: delete all previous codes.
/** codes starts here **/
SetOutputFilter DEFLATE
# Netscape 4.x has some problems…
BrowserMatch ^Mozilla/4 gzip-only-text/html
# Netscape 4.06-4.08 have some more problems
BrowserMatch ^Mozilla/4\.0[678] no-gzip
# MSIE masquerades as Netscape, but it is fine
# BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
# NOTE: Due to a bug in mod_setenvif up to Apache 2.0.48
# the above regex won’t work. You can use the following
# workaround to get the desired effect:
BrowserMatch \bMSI[E] !no-gzip !gzip-only-text/html
# Don’t compress images
SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
# Make sure proxies don’t deliver the wrong content
Header append Vary User-Agent env=!dont-vary
/** codes starts here **/
