When I attempt to add a new entry into Interwiki on my Local Wiki (URL: http://localhost/linux/index.php/$1) via the Special:Interwiki page, I get the following error (keeping in mind I have debugging enabled in my LocalSettings.php script):
Fatal error: Call to undefined method Interwiki::invalidateCache() in /var/lib/linux/extensions/Interwiki/Interwiki_body.php on line 291
This is what I entered into the Interwiki page before pressing "Add":
| Specification | Value |
| Operating system | 32 bit Ubuntu 15.04 |
| MediaWiki (MW) version | 1.25.1 |
| MW locale | /var/lib/linux/ |
| No of MW instances | 2. The other is located at /var/lib/mediawiki/ |
| MySQL version | 5.6.24-0ubuntu2 |
| PHP | 5.6.4-4ubuntu6 |
I have only just updated Interwiki (which I downloaded using git) using
git submodule init git submodule update
run from its base directory at /var/lib/linux/extensions/Interwiki. In this new instance of MW I have never used Interwiki yet, so if you want to know if I've used it successfully before I'm afraid the answer is no as I haven't tried. If I've missed any information you require to help fix this problem just ask and I'll gladly give it where possible.