Help with a problem my Nan is having with her Monkey Puzzle Tree

I am hoping you can give me some advice on an issue my Grandma is having with her Monkey Puzzle Tree (Please see attached photos).


The tree is 30+ years old and has been in good health up until recently.


We noticed these lumps at the base last week and are sticky and seem very resin-like. We work on her garden once a fortnight and therefore I and my wife believe it must have appeared relatively quickly.


If possible please can you tell me what the issues might be with the Monkey Puzzle tree, how we can treat the problem and the prognoses for the long term survival of the tree.


Thank you in anticipation of your help.