Paper: 1.16.3 (248)
DiscordSRV: 1.20.0

When the server is started, this error message shows up. I have not observed any issues related to it.

06.11 16:21:26 [Server] ERROR [PlaceholderAPI] expansion class DSRVExpansion is outdated: 06.11 16:21:26 [Server] INFO Failed to load due to a [NoClassDefFoundError], attempted to use github/scarsz/discordsrv/dependencies/google/common/collect/ImmutableMap 06.11 16:21:26 [Server] ERROR [PlaceholderAPI] expansion class DSRVExpansion is outdated: 06.11 16:21:26 [Server] INFO Failed to load due to a [NoClassDefFoundError], attempted to use github/scarsz/discordsrv/dependencies/google/common/collect/ImmutableMap

The placeholderapi expansion is no longer required, you can remove it from the PlaceholderAPI expansions folder. The expansion is now integrated in DiscordSRV