Error -1 when updating plugins and theme

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Hey guys,

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Since like 1 week i can’t update my plugins or my theme on my wordpress site. I tried to google the problem and a solution but i didn’t find anything.

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When i update a plugin the maintenance mode starts and after a while i get a failure message. Doesn’t matter which plugin or theme i want to update, i always get an error.

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When i update through the plugin site in wordpress i directly get the error -1.

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Any help ? Thanks!!!

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