Hey @Musab_Omariyeh ! Thanks for the report, I think you’re facing the same issue as @SamerB .
I have made some changes to Manager that will help us narrow down the issue a bit more, can you please install the beta version of Manager at the link below and let me know if you can install connectors?
If not, what error message do you see now?
Another thing that you could try is to ask your IT department to add our Certificate to the list of trusted ones:
If also that doesn’t work, I can provide you with direct links to install the connectors, although that’s not recommended as then you would not get any updates.