I have been working on a problem for a few days now. Our local mediawiki page that sits on our box account, destroyed itself and we\'ve been working to get it online. Using
Tgr's answer looks appropriate. The message about permissions etc. is a generic one; the actual error message is
2015-11-20 9:50:22 4600 [ERROR] InnoDB: Attempted to open a previously opened tablespace. Previous tablespace phpmyadmin/pma__tracking uses space ID: 21 at filepath: .\phpmyadmin\pma__tracking.ibd. Cannot open tablespace wiki/archive which uses space ID: 21 at filepath: .\wiki\archive.ibd
Your wiki database and phpmyadmin database somehow ended up with the same tablespace ID. Each would work fine if the other wasn't present; as it is now, you'll have to renumber one of them somehow.