Please see if the documentation @ https://success.outsystems.com/documentation/11/setup_outsystems_infrastructure_and_platform/setting_up_outsystems/cache_invalidation_in_outsystems_11/troubleshoot_outsystems_cache_invalidation_service/ helps.

btw I have followed the below steps when I had issues with reinstalling the cache invalidation service

1. Go to …\OutSystems\Platform Server\thirdparty\RabbitMQ Server\rabbitmq_server-3.7.7\sbin\ and execute "rabbitmq-service.bat remove" from CMD with admin rights.
2. Uninstall RabbitMQ Server ( from control panel )
3. Unistall Erlang OTP ( from control panel )
4. Open the Resource Monitor and look for the following processes: erl.exe, erlsrv.exe and epdm.exe.  If they are still running, right-click it and then click End Process
5. Go to …\OutSystems\Platform Server\thirdparty and delete RabbitMQ and Erlang folder
6. Go to the User folder: C:\Users[your_username], and then delete the file .erlang.cookie file.
7. Go to AppData\Roaming\RabbitMQ (shortcut: %appdata%); Backup the Log folder to a secure location, and then delete the folder;
8. Go back to the Configuration Tool, and reinstall the cache invalidation service using the Create/Upgrade Service button (Cache tab)