Sounds like you are having javascript issues.
To determine if the issue is caused by your theme, try switching momentarily to a WP theme like 2016.
Also check your browser console for errors and your site’s error-log.
If I change theme, I do not lose anything about the changes? Excuse me but I’m not very expert about it. How can I access the console to check for errors?
You shouldn’t lose changes – but I cannot guarantee it.
Use google to search for instructions on how to access the console from your specific browser.
I have been trying to find any error on the site with the wordpress assistance but couldn’t find any, actually. Everything seems to be working fine and I couldn’t see any JavaScript problems. I tried to change the theme and put 2016 but the error was still there. After I deactivated the plugins one by one to see if the error persisted and something strange happened: I disabled the buddypress activity filter plugin. I reloaded the page and on the first try the error disappeared and loaded all the other posts. However, since the second attempt did not work. I tried to completely delete the plugin but it did not change. I reinstalled it and still nothing. What could be the problem?
> buddypress activity filter plugin
I am not familiar with that plugin. But plugins sometimes cause problems even after deactivating them.
You should contact the author of that plugin and explain your issue.
Ok, there are updates on the problem I had today. Now I’ve tried to change strategy: I change the activity filter from the drop-down menu that I have at the top of the activity page https://snag.gy/FtDO0h.jpg (is displayed bad because I have not changed css yet). So, when I change the filter, the load button error at the bottom of the page ( “Sorry, no activities were found. Try with a different filter.” ) disappear. When I refresh the page and I click another time on the load button, the error reappers. Do you have any idea what the problem may be?I tried to contact the BP activity filter assistance but still don’t respond
The same thing happens with all the other devices or users