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[Connie]

Fresh install without any old plugins?

well, a fresh install without any old pages, plugins etc. produced the 500 message

what I did: 

• I deleted the uploaded files
  
• I set all PHP versions back  step by step , from 8.x to 7.4.33
  
• uploaded and tried to install all versions back to 3.3.15
  
• I ended up with GS 3-3-16
  

then I was desperate, always Apache Message 500

• I then found hints in the .htaccess:
  # The following require certain allow overrides, if getting 500 error comment them out one by one
  # can be resolved in apache httpd.conf to ensure security alternatives
  
• I then deactivated "# Options +FollowSymLinks"
  
• I could finish the setup, login etc. => so I dared to upload the saved content / files etc. from the former place
  
  
• The website worked, all pages there, menue works etc.
  

BUT:

• I cannot edit pages, whenever I try to edit an existing  page,  => 500
  
• I have to delete a page, create it new, modify it and publish it, after saving the page = 500!
  
• I can go back to ... / admin and open the pages tab: the new page is there, but a new page without a name is created as well!
  I have to delete the new nameless page
  
• I can edit the template / Theme files and the CSS without any problem, but I cannot edit the pages (XML)
  

As far as I understand, all XML - options are active on my host, please check: https://www.lyriktext.de/wasistdas.php

The website is online again, with PHP 7.4.33 and GS 3.3.16 

It took me nearly one day to have a half-operable installation (Frontend), and I lost my trust to GS (you know I was an avid user years ago, user and contributor - now I feel like a victim )