An APS installation is stuck. It does not fail, but seems to do nothing at all.
This issue is caused by multiple unfinished
Please do the following:
End multiple stuck
Start > Run > cmd > taskmgr.exe > go to Processes tab > right-clink on `sappmng` > End Process Tree
Clean up the
"%plesk_bin%\\dbclient.exe" --direct-sql --sql="delete from longtasks"
Clear the application cache:
Tools & Settings > Applications & Databases > Application Vault > Clear Cache
Try to install the desired APS again.