Suddenly will not add blocks
(I'm using 22.214.171.124)
It will show you the more details error message and will be helpful to find the issue. Also you can check your logs from dashboard.
PHP 5.2.4 or greater (PHP >= 5.3 recommended)
PHP Modules: CURL, zip, mcrypt, openssl, GD (with freetype), mysql, mbstring, iconv (iconv needed for Zend Locale)
PHP settings (primarily for file uploads) post_max_upload_filesize = 20, post_max_size = 20, php memory limit to 64 (More may be needed for memory intensive operations, such as upgrading.)
PHP Safe Mode Off
MySQL 5.x or higher.
Apache/IIS (Apache recommended)
I have had something similar and it was down to the php version.
GD (does not define free type, just “GD”)
Apache: (no IIS stated) v 2.4.12
MySQL does not show a version.
PHP v 5.5.29 (so that should be ok)
I'll keep searching... and will get back here if I find a solution...otherwise, I am still open to suggestions...cant do anything new with my site until this is resolved.