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how about sportsdevil add on?

You are most welcome.
What addon version are you running and what prompts the error. Let me see if I can duplicate it on my end.
Welcome to the life of cord cutting. Don't matter why you bought the device.. There's no 100% guarantee.. Want such? Give Astro a call.   Links not loading could either be as a result of dead links or server is overloaded and can't take in anymore. This happens particularly for live streams of live matches, most are shutdown much faster than VOD stream urls. Thing is, it's normal for addons and or links to end up dead temporarily or permanently. Need to move on and seek alternatives. Unfortunately, I'm not much of an NBA fan to recommend one that's currently working. However, if I do bump into one.. I'll share here.

I don't think you should reinstall Kodi just yet. Try reinstalling the addon and or check other sports links if working or not. Should tell if it's an addon or connection issue.