login page not available

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Hi,
I've installed C5 and my site is running. But now I cannot login anymore to the dasboard.
If I type in the adressewww.www.history-vehicles.lu/index.php/login... I get this message:
An unexpected error occurred.
file_put_contents(): Exclusive locks are not supported for this stream

 
Steevb replied on at Permalink Reply
Steevb
Works for me?