Bug
We identified a bug where, after installing the Clean Url module on Omeka S3 and performing the initial configuration, the configured item identifiers were not displayed on the site’s item detail pages and elsewhere. Instead, the automatically assigned Omeka IDs were displayed as-is.
Affected Versions
- OmekaS 3.1.1
- CleanUrl 3.17.3.3
Temporary Fix
On the settings screen shown below, first check the “Skip ’s/site-slug/’ for default site” checkbox and click “Submit” in the upper right corner. Then, uncheck “Skip ’s/site-slug/’ for default site” again and click “Submit” once more. After this operation, the property ID configured in “Property for identifier” was correctly displayed as the item identifier.

Summary
We hope this serves as a useful reference for those experiencing the same issue.
A GitHub Issue has been created for this matter.
https://github.com/Daniel-KM/Omeka-S-module-CleanUrl/issues/9