Fresh install into webserver error

[ibekannfarms]

I’m trying to install a new farmos but I keep getting error

The website encountered an unexpected error. Try again later.
Error: Class “Drupal\Component\Render\PlainTextOutput” not found in Drupal\Core\Template\Attribute->createAttributeValue() (line 145 of core/lib/Drupal/Core/Template/Attribute.php).

[mstenta]

@ibekannfarms

Error: Class “Drupal\Component\Render\PlainTextOutput” not found

It sounds like you might be missing files. How did you “install” the farmOS codebase? Can you list the steps that you took, and describe the hosting environment in more detail?