Could you maybe report this here https://github.com/Elgg/Elgg/issues
Or give us steps to reproduce so we can try to fix it. Please make sure to mention any plugin that are active that could influence the outcome of the action.
If you have the Developers plugin enabled you can go to Admin -> Develop -> Inspect -> Actions Search for 'thewire/add' and if that is not '/mod/thewire/actions/add' then a plugin is taking over the action. Try disabling the plugin and try again. If there is no issue, then it's not a core issue and you should contact the plugin developer.
You are NOT using the latest version of Elgg 5.1 if you are on Elgg 5.1.9.
The bug you have has mostly likely been fixed in Elgg 5.1.10:
thewire: correctly handle string length for multi-byte charactersNow there's already Elgg 5.1.11 available. Please upgrade, test and only report a bug if you still have the problem also with Elgg 5.1.11.
Spam Login Filter Settings:
You can also try this - https://github.com/rohit1290/registration_randomizer. This will generate a unique link for registration valid for few min and then expires. If someone is using bot to register on your site then it will stop it.
info@elgg.org
Security issues should be reported to security@elgg.org!
©2014 the Elgg Foundation
Elgg is a registered trademark of Thematic Networks.
Cover image by Raül Utrera is used under Creative Commons license.
Icons by Flaticon and FontAwesome.