Outer join operator not allowed with OR in my WHERE clause - Error: ORA-01719 - sql

Question

I need to check for the conditions at the bottom, but I cannot change use OR because of the (+) that are involved. I did not set that part up, so I am not sure how to rearrange it. Can someone tell me what I could do to get those conditions to go through?
SELECT DISTINCT
t.tkt_sid,
ts.tkt_sts_dsc,
tp.prty_dsc,
a.agt_cont_nbr,
au_a.user_nm assigned_to,
t.rcd_lst_user_ts
FROM
afp_asd.tkt t,
afp_asd.tkt_prty tp,
afp_asd.tkt_sts ts,
afp_asd.tkt_type tt,
afp_asd.tkt_log tl,
afp_asd.agt a,
afp_asd.asd_user au_a,
afp_asd.asd_user au_c,
afp_asd.asd_user au_l,
afp_asd.asd_user au_log,
afp_asd.prb_area pa1,
afp_asd.prb_area pa2,
afp_asd.prb_area pa3,
afp_asd.mktg_org mo,
afp_asd.src_sys ss,
afp_asd.agt ofc,
afp_asd.co c,
afp_asd.agt_sts ast
WHERE (
t.prty_cd = tp.prty_cd
AND t.tkt_sts_cd = ts.tkt_sts_cd
AND t.tkt_type_cd = tt.tkt_type_cd
AND t.agt_sid = a.agt_sid
AND t.assigned_id = au_a.asd_user_id
AND t.rcd_crt_user_id = au_c.asd_user_id (+)
AND t.lst_updater_id = au_l.asd_user_id
AND t.tkt_sid = tl.tkt_sid
AND t.prb_area_sid = pa3.prb_area_sid
AND tl.rcd_crt_user_id = au_log.asd_user_id
AND pa3.prb_hier_sid = pa2.prb_area_sid (+)
AND pa2.prb_hier_sid = pa1.prb_area_sid (+)
AND a.mktg_org_cd = mo.mktg_org_cd
AND a.src_sys_cd = mo.src_sys_cd
AND a.src_sys_cd = ss.src_sys_cd
AND a.ofc_id = ofc.agt_cont_nbr (+)
AND a.src_sys_cd = ofc.src_sys_cd (+)
AND a.co_sid = c.co_sid (+)
AND a.agt_sts_cd = ast.agt_sts_cd
AND tl.rcd_lst_user_ts >= :b_start_date
AND t.user_grp_sid = :b_group_id
)
AND (
(TKT_STS_DSC NOT LIKE 'Completed')
OR (
tp.prty_dsc = 'High'
AND ts.tkt_sts_dsc = 'Pending'
AND t.rcd_lst_user_ts < SYSDATE- 2
)
OR (
t.rcd_lst_user_ts < SYSDATE- 3
AND ts.tkt_sts_dsc = 'In Progress'
AND tp.prty_dsc = 'High'
)
OR (
t.rcd_lst_user_ts < SYSDATE- 15
AND ts.tkt_sts_dsc = 'In Progress'
AND tp.prty_dsc = 'Medium'
)
OR (
t.rcd_lst_user_ts < SYSDATE- 28
AND ts.tkt_sts_dsc = 'In Progress'
AND tp.prty_dsc = 'Low'
)
OR (
t.rcd_lst_user_ts < SYSDATE- 7
AND ts.tkt_sts_dsc = 'Pending'
AND tp.prty_dsc = 'High'
)
OR (
t.rcd_lst_user_ts < SYSDATE- 21
AND ts.tkt_sts_dsc = 'Pending'
AND tp.prty_dsc = 'Medium'
)
OR (
t.rcd_lst_user_ts < SYSDATE- 43
AND ts.tkt_sts_dsc = 'Pending'
AND tp.prty_dsc = 'Low'
)
)
ORDER BY ASSIGNED_TO,
PRTY_DSC

Answer 1

Don't use the old FROM TableA,TableB WHERE ... join syntax. Just don't.
Instead, write out your joins individually:
FROM TableA
INNER JOIN TableB ON ...
LEFT JOIN TableC ON ...
This isn't just a general rant against the old syntax: using the new (I say "new", but it's more than 20 years old now), standard syntax will fix your problem in this case.