Initialization error Could not load : oci.dll error in Oracle PHP Generator Professional

I have Oracle PHP Generator Professional licensed version and facing the issue as below

Initialization error Could not load
“E:OracleDatabaseOrclproduct12.1.0dbhome_1binoci.dll”
OracleHomeKey:
OracleHomeDir: E:Oracle DatabaseOrclproduct12.1.0dbhome_1 Found: oci.dll
Using: E:OracleDatabaseOrclproduct12.1.0dbhome_1binoci.dll
LoadLibrary(E:Oracle DatabaseOrclproduct12.1.0dbhome_1binoci.dll) returned 0
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I have Oracle 12C is installed on my system