Hi @Omar Hafez Mustafa Hafiz Mohamed
Is there any error code shown after the error message? If yes, you may tell us for better analysis.
Do other users in your college have the same issue?
I suggest you go to OneDrive online from My Account page.
Besides, please try to sign into OneDrive online in other network environment. For example, using a mobile hotspot for a check.
You may change the browser or use "New InPrivate window" to have a check.
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