Issue with App MicroDoc's OPC UA Browser

I have installed the application MicroDoc’s OPC UA Browser, and now I am getting the error: Error while connecting to OPC UA Server: BadConnectionRejected.
I do not know what I should do.
I would appreciate it if someone could help and provide assistance.
I am using axc-f-2152 PLC.

Here is the OPC Configuration in PLCnext Engineer:

Hi Ayoub,

If you have not stored any certificate in the Trust Store, the
“Use the truststore for client authentication” option is not applied
and the OPC UA server trusts all clients. Try this setup in PLCnext Engineer,

Best Regards Acke