'Can not access any other files than the root directory of the site

When i access my website: https://antwoorden.alpacapanel.eu/ i see everyting fine but when i click on one of the buttons it won't show the file that the button needs to send me to it worked fine in cpanel but i move to webmin with apache and now it does not work at all

i have already tried to acces them from /files and they are in the directory of the website

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