The rule it hangs on:
modparam("uac_registrant", "uac", "sip:opensips@195.60.212.84,,,,,,,,")

The errors:
Sep 29 09:23:32 voip01 opensips: ERROR:core:set_mod_param_regex: no module matching uac_registrant found
Sep 29 09:23:32 voip01 opensips: CRITICAL:core:yyerror: parse error in config file, line 97, column 20-21: Parameter <uac> not found in module <uac_registrant>  - can't set
Sep 29 09:23:32 voip01 opensips: ERROR:core:main: bad config file (1 errors)