Adobe Indesign Mac - Crash after adding a plugin

Hello guys,

I'm trying to port our Adobe Indesign plugin from Windows to Mac but I'm facing a problem; 

When I paste the plugin to /Applications/Adobe InDesign 2021/Plug-Ins and I try to open InDesign;

It crashes immediately, the last thing I see in the process is 'Executing startup services'.

I tried to find out the root cause of the crash and it appears that this class if deleted from the .fr file, there is no crash but InDesign can't load the plugin.

Class
{
kIDgUIPreflightRuleSPBoss,
kInvalidClass,
{
IID_IK2SERVICEPROVIDER,kPreflightRuleSPImpl,
IID_IPREFLIGHTRULESERVICE,kIDgUIPreflightRuleServiceImpl,

}
},

Same code works perfectly on Windows; compiles correctly on MacOs but crashes on startup.

Do anyone have any ideas? 

Thanks in advance.