Loss of functions

Hi there, I have  <span style="color: #444444; font-family: 'Open Sans', sans-serif; font-size: 13px; line-height: 19.5px; background-color: #f1f1f1;">4.4.1–</span><span style="font-weight: 600; color: #444444; font-family: 'Open Sans', sans-serif; font-size: 13px; line-height: 19.5px; background-color: #f1f1f1;">pt_PT</span><span style="line-height: 1.5;"> and WPLMS 2.0. Started by having a problem updating WPLMS new version - after uploading I get the message "Are you sure you want to do this?" and it forces me to try again over and over, never having a success message. Now, while working with no problems with Units, withing the Unit page I click "link" in visual mode and nothing happens. I then click html mode to get the html code for a hyperlink and it doesn't move. It doesn't happen for pages nor posts. Ideas, please? Thanks</span>