Uploading sub-template not working

I finally managed to find something that looks like it could be relevant in, of all places /var/log/httpd/ssl_error_log. I'm not sure if this is the cause of the problem (my PHP skills are a bit rudimentary), but here goes:

[Wed Feb 19 13:02:32.992672 2020] [php7:notice] [pid 64324] [client 143.167.16.2:57201] Failed to load language file for Xerte - en-GB/editor/js/vendor/jquery-1.9.1.min.js, referer: [xerte_url]management.php

(The actual Xerte URL is in the original error message, but I can't post a URL in here for some reason.)

Hi,

No, that's not it.

Could you please set $development to true in the config.php file (on line 43) of the xerte installation, retry, change developer back to the original value? Then check the logs again, and also the error_logs/debug.log file?

Okay, I think I found something actually relevant this time:

[Wed Feb 19 15:41:37.796379 2020] [php7:error] [pid 15935] [client 143.167.16.2:58521] PHP Fatal error: Uncaught Error: Class 'ZipArchive' not found in /var/www/html/website_code/php/management/upload.php:77\nStack trace:\n#0 {main}\n thrown in /var/www/html/website_code/php/management/upload.php on line 77, referer: [Xerte URL]/management.php

Yes.... that's probably it. Hold on, will have a look.

In the meantime, can you tell me what OS you're running on? Ubuntu? CentOS?

Thanks. The system's running CentOS 7.7. (It's an older machine.)

Hi,

The php-zip extension needs to be installed and enabled.

On Centos you would normally do this with

On Ubuntu you would use

After that, don't forget to reload (or restart) the apache2 server: