COMMAND_FAILED error when trying to add services to firewalld

[bodie12]

I'm trying to add ftp service to firewalld and every time I run

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firewall-cmd --add-service=ftp

this is with out the permanent flag I get

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Error: COMMAND_FAILED

If I run

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firewall-cmd --permanent --add-service=ftp

with the permanent flag

it returns

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success

However after I reload the service I can't connect via ssh anymore until i disable firewalld over rescue mode.

and no, Im not trying to open ssh's port i was using ftp as an exaple, im just stating i lose access to the server after

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running firewall-cmd --permanent --add-service=ANYSERVICE

(NOT JUST FTP) and then reload with

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firewall-cmd --reload

[TrevorH]

What's the output from uname -a ?