I have stable internet connection which I tested with tools > options > test connection, which returns a green tick. Is this issue related to OS ?
What version of Endless OS are you using?
To check which version of Endless OS you are in Settings Details
So sorry for responding so late
the version is: 3.3.19 (180611-160226)
Finally I updated my OS but still the problem persists, I also checked for update of netBeans and got nothing in the app center. What should I do now ? Reinstall the IDE ?
I cannot check for plugin updates
thanks for the pointer