I got the many of following errors.

In the end, I had to restart Lazarus and ran it as Administrator to solve it.

Maybe the lazarus installer can be modified to avoid these in the future.

Dennis
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I got the many of following errors.

When Lazarus compiles a package it checks if the package output directory is writable. If not writable it uses uses a directory in its config directory (default under Windows
C:\Users\username\AppData\local\Lazarus\bin\packagename\)

Which means, either you found a bug, or you have a broken installation.

How did you install Lazarus?
Please create a bug report and include the content of View / IDE Internals / About IDE

Mattias