I run a FiveM Server and one of my admins is having the same issue. Also I’m not a mod but I believe they want you to have their template filled out. Also try attaching your CitizenFX.log file so they can see what FiveM does when you open it.
EDIT: Also specify what version of Windows you are running and if it’s windows 10 specify if you’re on version 1809 (October 2018 Update) or 1903 (May 2019 Update) as for my admin this started happening after his PC updated to 1903.