There is a workaround for Packslip ‘Parameter key’ value null error running Packslip reports.. Props to [josecgomez] who provided the workaround they reference in the Support ticket .. Ticket response: The reported issue is linked to PRB0308509.
A hotfix was initially planned for Kinetic 2025.2.7; however, the solution is more complex than originally expected. Development is finalizing the code fix, which will be included in the upcoming Kinetic 2025.2.10 update.
Until then, the safest and least disruptive approach to print custom PackSlip SSRS reports involving phantom packs is to apply the workaround documented in the following epiusers. help thread.