Hey, Delicious Brains here. We acquired Advanced Custom Fields from Elliot back in June.
To give everyone some clarity here – the ACF Repeater addon was available as a premium addon to ACF a few years back, and would have been the plugin you had installed up until yesterday. The latest version of that addon is 2.1.0.
Unfortunately, www.remarpro.com approved a plugin with the same folder name as our ACF Repeater addon (acf-repeater), which had the version 5.10.2. This meant WordPress would auto-upgrade you to that version of the plugin.
Whilst there was nothing malicious about that version of the plugin, because it has since been deactivated by the WordPress team, it may have deactivated on your site too.
To resolve this, you’ll need to re-download the latest original version of the ACF Repeater addon (version 2.10.0) from your account and re-upload it to your site. It will need to be activated if it isn’t already.
Sorry for the inconvenience. We’re working with the WordPress plugins team to make sure this can’t happen again with any of our legacy addons. If you have any other issues, or trouble downloading the original plugin from your account please let us know.