Some providers have OpCache enabled and this is probably causing the issue.
You can verify this by viewing you're error.log, does it state: Failed to read FastCGI header: ?
Then the this error is due to an active OpCache.
Take a look into you're php info to make sure OpCache is enabled and disable this.
You can do so to place the following line into an .htaccess file:
php_flag opcache.enable Off
Now there shouldn't be any troubles for SCC to save content.