I am a family history consultant, and this is the first time that I am getting this message constantly.
It sounds like you need to delete your brower history and cookies. You can find that option in your brower settings. When you delete them, be sure and delete all history and cookie from start. If you have not done this in a long time, it will take a while for it to complete. After that has completed, go back into index and it should load properly when you open a record.
In addition to Tom123 comment may I also suggest delete cookies in FamilySearch, below is a link with the explanation how to delete in FamilySearch.. Hope this helps.
Delete cookies • FamilySearch