I have occurred that problem , and I'm asking for a solution
they told me to notify Ubuntu mate developers about it , that's why i'm posting that topic , sorry for my English 
Thanks @anon42388993. 
This one has been caused by the French translation, as there is a hyphen in Obtenir plus d'applications and this causes interference with the parsing for the rest of link.
This won’t be a problem in future, as this version of Software Boutique is going to be replaced eventually with a new version re-written from scratch, which will handle translations much better. 
i hope you do the best 