OS update disappeared from app center

english help
4

I can’t comment there, but problem for this is solved by fallowing instructions bellow.
Iam using Endless 3.8.6 version.

press the keys alt+f2, write the letter r and press enter

https://support.endlessos.org/en/help-center/Why-does-the-computer-seem-to-get-slower-over-time-or-when-visiting-a-lot-of-websites