Can not load the site ( [B )

I am istalled a new nextcloud site with some default settings (ssl, homepage redirect). I went to made a coffe and whe I came back I can not reach te site. I just see [B in a white page. Sry about it, am very bad abut html.

Somebody culd u help me what is the problem?

Link

Now its completly down.
Did see the error though.

would you like to post the error and access logs of the webserver and maybe the webserver configuration. Did you try to reboot the server while calmly trinking your coffee?

Please specify as much infos as you can (see the template) otherwise there is no way we can help you.

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