Failed to start debug session

DBG 12.0.16


Failed to start DBG session


Reason: connection to the client at clienthost (3.12.74.138) is not allowed in php configuration (php.ini)
Not sure what it means? Visit http://www.nusphere.com/dbg/?err=-100 for troubleshooting.
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Debugger request:   "1732113504"
Request found in:   "DebugBreak()"
Target PHP version: "7.4.x"
Server API:         "lsapi V8.1 CloudLinux 1.3"
Extensions API:     "320190902"
Modules API:        "20190902"
PHP API:            "20190902"