RPHE0125W

An error occurred during the log of the request content. Explanation message: '%1'.

Something went wrong while logging an HTTP payload with a content-type that might not be checkmark_perf.jpg by the underlying log system (cisterna). Such an attachment will simply not be logged with the other events and won't be available in the Test Log explorer.
No system action.
In case the content type is a commonly used one, consider creating a feature request to get this content-type checkmark_perf.jpg by the product.