iqmgmt_ssl_connect: SSL error

hello

I want to ask regarding the iqury monitor failure from GTM to LTM where we have integrated GTM with LTM with bigip add but after doing this on the server tab, the monitor is intermittent
the GTM log shows this:

iqmgmt_ssl_connect: SSL error: SSL connect (1)
iqmgmt_ssl_connect: SSL error: error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed (336134278) from connection

has anyone experienced this? is there any solution regarding this

Thank You