Can't Send SMS messages but can receive

Hello i am having a problem with sending SMS messages about a month now.
I narrowed down the fault being the Custom Rom i run.

Phone : S3 I9300 ( International)
ROM : Unofficial CM 13 SaberMod
Rom Link : http://ift.tt/28WOmDu
Tried using 3rd party SMS app (Textra)
Tried rebooting ( first thing )
Tried Fresh Install of the ROM
Tried Removing and inserting the sim
Tired of not finding a solution

Please help because other members have the same issue.

Thank you very Much!!!

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