[RIOT] PLEASE HELP Mastery server bug or error or glitch

The screenshot depicts my error or bug in which every time i try to save a mastery page or switch to another page i get this error message and i did not see many solutions on this website that would offer fix it. I have tried to repair and reinstall which none has worked so far so PLEASE HELP [zombie-brand-mindblown] [zombie-nunu-bummed]

[UPDATE] It actually let me save the masteries when i dont change the name of the page. which means that once i change the name of the page is causes my bug that i am unable to change my mastery points.