SEO & SEF URLs issue

I've sent another PM.

in your site sef isn't actived that normal url
weblink create a specific URL for prevent SEO and count hit if you didn't want this edit your weblink field and disable this option

I have tried to add an item manually and when saving it I get this error: Class 'UsersModelUsers' not found. The same thing happens if I edit an item. I've searched on Google and haven't found anything. Before installing the beta version it didn't happen to me. To add the items to Flexicontent, I use another component that automates the process.
I do not have activated the SEF links, the cache and anything that has to do with SEO, since access to the information is restricted to registered users.

For weblink

weblink create a specific URL for prevent SEO and count hit if you didn't want this edit your weblink field and disable this option

for the error on save please set to yes debug mode in joomla configuration in order to have complet error

I`ve sent a new PM.

for your error desactived flexicontent finder plugin that it
edit your field enlace (not in item, edit field configuration)
in display tab > layout
Set yes to use direct link