This has been seen on Tikiwiki 2.0 & 2.2: Trying to install the "googlecalendar" wikiplugin from "Admin mods" fails. A page appears stating "wiki-plugins/googlecalendar/wiki-plugins/wikiplugin_googlecalendar.php to impossible to copy".
This appears to be caused by a typo in the Packages/wikiplugins-googlecalendar.info.txt file on the line that states where to copy the plugin file to. There is no space between the source and destination paths and the "lib" directory the plugin should be copied to is missing.
Change line 11 of Packages/wikiplugins-googlecalendar.info.txt :
11c11
< wiki-plugins/googlecalendar/wiki-plugins/wikiplugin_googlecalendar.php
> wiki-plugins/googlecalendar lib/wiki-plugins/wikiplugin_googlecalendar.php
To help developers solve the bug, we kindly request that you demonstrate your bug on a show2.tiki.org instance. To start, simply select a version and click on "Create show2.tiki.org instance". Once the instance is ready (in a minute or two), as indicated in the status window below, you can then access that instance, login (the initial admin username/password is "admin") and configure the Tiki to demonstrate your bug. Priority will be given to bugs that have been demonstrated on show2.tiki.org.
To help developers solve the bug, we kindly request that you demonstrate your bug on a show.tikiwiki.org instance. To start, simply select a version and click on "Create show.tikiwiki.org instance". Once the instance is ready (in a minute or two), as indicated in the status window below, you can then access that instance, login (the initial admin username/password is "admin") and configure the Tiki to demonstrate your bug. Priority will be given to bugs that have been demonstrated on show.tikiwiki.org.