hey, I have a serious problem
I tried to update my current add-ons list and showed me that I have 5 or 6 to update
after clicking to update them it shows me that I have updated my list
after clicking the “check for updates” button again it shows me the same addons that I have updated before
my Anki version is 2.1.35
but the same issue was on the updated version of anki
Uninstall countdown to events exams, then update, everything will be ok.
Also, a common debugging technique is to disable all add-ons and add in either one at a time, of half of the reminder and stop when something happens, this way you could quickly narrow down the offending plugin.
thnx i’ll try in next problem 
incredible u r the best 