**List of steps to reproduce** (step by step, including full links if applicable):
* Install and configure extension with default settings
* Create/Edit a wikitext page with:
```
{{#get_file_data:
file=data/json/data.json
|format=TEXT
}}
```
Note: TEXT can be any valid format, such as CSV, JSON, etc.
**What happens?**:
```
Error: No "data" parameter specified.
Error: No "data" parameter specified.
File data/json/data.json is not defined.
```
**What should have happened instead?**:
```
Error: No "data" parameter specified.
File data/json/data.json is not defined.
```
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.**:
- Latest release of ExternalData extension https://extdist.wmflabs.org/dist/extensions/ExternalData-REL1_37-8f32e19.tar.gz
Also I just now see that that ExtensionDistributor release is v2.4.1 from 11+ months ago as seen here: https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/ExternalData/+log/refs/heads/master/extension.js
And I also just tested this bug with v3.1 (up-to-date master branch of git repo), and the issue still exists