Php calls COM and reports 500. how can this problem be solved?

Php calls COM and reports 500 using COM to call DLL on the local machine. if it is put on the server, the 500 error is reported. it should not be a DLL problem. if it is changed to DOC, the 500 error is reported, for the expert's answer, only the last 25 minutes T_T is left. in the "service", what language is your DLL compiled? The corresponding runtime library may also be required (M php calls COM to report 500
If you use COM to call the DLL on the local machine, the 500 error will be reported when you put it on the server. it should not be a DLL problem. if you change it to DOC, the 500 error will be reported, only the last 25 minutes T_T

------ Solution --------------------
Open in "service"
What language is your DLL compiled?
You may also need the appropriate runtime library (except MSC and MFC, unless your version is higher)