RMAN-06136: Oracle error from auxiliary database: ORA-17629: Cannot connect to the remote database s

Can someone help with this issue. Oracle recommendation of SQLNET.INBOUND_CONNECT_TIMEOUT = 120 is taken care.

Recovery Manager: Release 19.0.0.0.0 - Production on Fri Jul 23 17:45:11 2021

Version 19.9.0.0.0

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RMAN> connect target *

2> connect auxiliary *

3> set encryption off;

4> run{

5> allocate channel p1 type disk;

6> allocate channel p2 type disk;

7> allocate channel p3 type disk;

8> allocate channel p4 type disk;

9> allocate channel p5 type disk;

10> allocate channel p6 type disk;

11> allocate channel p7 type disk;

12> allocate channel p8 type disk;

13> allocate channel p9 type disk;

14> allocate channel pa type disk;

15> allocate channel pb type disk;

16>

17> allocate auxiliary channel s1 type disk;