Starting at the end of August 2022, Discord will only allow bot commands to be called by slash commands.
Slash commands are a new way to interact with bots on Discord. Simply type "/" in your text box to view available commands.
Discord Slash Command promo video
When the Slash Command update for Eventcord was published, the bot attempted to generate commands for every server. Eventcord uses guild-based slash command instead of global commands to allow for localization. If you do not see any slash commands, try using <@480889253165793290>setup slash. If you receive an error, try reauthorizing the bot by using the invite link.
Eventcord started using slash commands before Discord created a multi-lingual feature for them. As such, Eventcord uses server slash command which only work for your server in your specified language. There may be a disagreement between the generated slash commands and what Eventcord accepts due to this. Use <@480889253165793290>setup slash to regenerate commands for your server.