We really need your help. I really dont know which plugin has the issue between toolset or yoast plugin.
But when yoast plugin active the repeat group only Loading never finish. I already contact yoast plugin about it and they cant find the issue.
When we disable the yoast plugin the repaet group back good.
Aha I just notice this:
1. when I create new page/post/custom, the repeat group still work well "not Loading...".
2. after I publish the page/post/custom, the repeat group only "Loading..." and never show the field.
3. but when I disable the yoast plugin, the repeat group be normal again.
I just tested this on my own site and couldn't reproduce the problem, there were no issues on the post edit screen using repeatable field groups if Yoast was active.
Yoast just updated to version 15.0, can you confirm if you are using that current version?
If so, are there any errors in the browser console?
I think we will need a copy of your site to test locally to see the issue.
Please see the following link about how to prepare a copy to be shared: hidden link
You can paste a link to the archives at dropbox or similar here and they will only be visible to us.