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also, I reinstall buddypress as modemlooper mentioned. Thank you!

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I opened again my site, I delete some plugins and my current theme and now is hopefully working!

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I achieved to get access in dashboard but the site is still blank. Should I reinstall Buddypress plugin? Will I lose smothing with this from my data?

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Nothing happen after deleting some group codex in function.php. I am really confused..

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First, as I remember I unchecked Groups from the dashboard. Then, I got the blanc page in my site. After this, in my themes/huddle I deleted Groups folder. Then I read this one
https://buddypress.org/support/topic/resolved-help-my-whole-website-has-gone-blank/
and I was trying to delete anyhting about Groups in function.php.I tried to rename the plugins but it said rename failed. Is it possible to lose my members,my date and to have to rebuilt my site?

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I turned off Groups from Buddypress settings in Dashboard and then nothing, blank page, I have members and data in the site please help me!