An ad hoc report will not run online, run offline or export when its dynamic parameters are set to "All" or else sufficiently large categories.
SAP SuccessFactors Ad Hoc Reports
The large categories cause the query to time out before it can run online. It cannot be exported because it has to run online first, and it cannot run offline because of the dynamic parameters.
Therefore there is no way to run it with these settings.
Create a new version of the report without dynamic parameters. Set the filters permanently to "All" or the desired categories.
The new report will be impossible to run online or export, but it can be run offline for download. The size will not be an issue.
KBA , LOD-SF-ANA-ADH , Adhoc Reports & Report Builder , Problem