Hello Mehdi,

Thank you for reaching out to us.

Does this issue occur with all admin users or just specific one?

Looking forward to your reply.

Hello Mehdi,

Thank you for the update on this.

Please provide me a temporary WP-admin (administrator) user for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. 

We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course, we do not provide login data to third parties. 

You can write credentials here just check PRIVATE Reply so nobody can see them except us.

Hello Mehdi,

Can you please provide me with the credentials of the admin user that you used to check appointments on the back-end?

Looking forward to your reply.

Hello Mehdi,

Thank you for the update on this.

This usually happens when your database is configured to use SQL_BIG_SELECTS, but Amelia has that turned off by default because the majority of databases don't use it.

If you know your way around the database, you can enable this yourself by going into the wp_options database table (wp_ is the default database prefix, but it could be anything on your end):

In there, click on SEARCH at the top, and in the "option_name" column search for "amelia_settings":

The search will return only one row, and you need to edit it:

In "option_value" column, search for "pdoBigSelect":

It is currently set to false, as you can see in the screenshot above, so just change that to true, save the settings, and try editing the event again.

If that fails, or if you're not familiar with phpMyAdmin, please provide us with a temporary wp-admin (administrator) user for your website, along with the database access credentials (phpMyAdmin or cPanel), and I'll gladly take a look.