**Steps to reproduce**
1. Open Special:PageMigration
2. Search in the Textbox for the name of a page that has a translation. Eg: //Main Page/fr//
3. Click on Import
**Expected behavior**
UI should update and all for page migration.
**Actual behavior**
Nothing happens, the UI does not update at all nor does it show any errors.
**Additional info**
The following API call made from `getSourceUnits` method in file `ext.translate.special.pagemigration.js` is failing,
**API URL** -
```
/api.php?action=query&format=json&list=messagecollection&mcgroup=page-T160511&mclanguage=en&mcprop=definition
```
**Response** -
```
{
"error": {
"code": "translate-language-disabled-source",
"info": "The source language of this group is English. Please select another language to translate into.",
"*": "See http://127.0.0.1:8080/w/api.php for API usage. Subscribe to the mediawiki-api-announce mailing list at <https://lists.wikimedia.org/mailman/listinfo/mediawiki-api-announce> for notice of API deprecations and breaking changes."
}
}
```
**Comments from Niklas** -
That would mean converting the translate-language-disabled error to warning and making sure Special:Translate still handles it in the same way as it does currently