How to call a!StartProcessLink() inside a!gridColumn

Hi All, hope you all are doing great, I'm getting the following error:

Error Evaluating UI Expression Expression evaluation error [evaluation ID = PNO05] in rule 'abs_clientsearchresponse2' (called by rule 'abs_clientsearchrequest2') : A null parameter has been passed.

When trying to invoke a process model inside a!gridColumn as follows:

a!gridColumn(
label: "BUC",
value: a!richTextDisplayField(
label: fv!row.IDE_CLIENTE,
value: a!richTextItem(
text: fv!row.IDE_CLIENTE,
link: a!startProcessLink(
processModel: cons!ABS_CLIENT_REQUEST2_PM,
processParameters: {
buc: fv!row.IDE_CLIENTE
}
),
linkStyle: "STANDALONE",
color: "NEGATIVE",
size: "STANDARD",
style: "STRONG"
)
),
align: "CENTER"
)

The rule: 'abs_clientsearchresponse2' is displaying the row without any error:

But when I click over the BUC link, the above error is displayed, the pv is declared as Parameter with the same name in the PM, I haven't been able to find the root cause of the error. Could you please help me?

Any help will be greatly appreciated.

Thanks and regards,

Jose Castellot