When an administrator attempts to download a web certificate request from the /admin site, the download fails with the following error message
“Unable to Log request, please try again.”
To address this issue in 2.5.918, download and install Hotfix_9303 available here
This issue has been corrected in 2.5.919; from the 2.5.919 Release Notes:
"When generating a new web certificate request, clicking the Download Now button results in an error. BFER 9303"