Android SKD not found.

Unity Engine
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1

6522245--735967--upload_2020-11-14_3-14-57.png
Hey all, i was building apk files of project on 2019.4, 2020.1 and 2020,2 , but i cant build apk file on 2021.1a04.
Every time when i want to build apk its show me this error.
Unity HUB show that Android Build Support is already installed.

Any idea why its happening?
6522245--735971--upload_2020-11-14_3-16-40.png

2

Did you check the directory to make sure the files exist where it’s looking for them? If so, did you try restarting the Unity Editor like the message suggested?