Problems with script editing

[olegrz]

Hi, I have LM5 Reactor Lite (SW: 20180828) in operation since 2019. Some days ago I met problem with script editing. When I try to edit script by pressing of corresponding icon in "Editor" column I receive empty new screen. In the same time scripts operate normally. Also FB Editor icon is disappeared from the main screen. Deinstall/Install procedure did not help me. There were no these problems one month ago. 
Could you advice me hove to overcome these problems? Thnx! KR Oleg