Could not find interface: ISourceMod
 

I've just updated the SDK and sourcemod and rebuilt an extension.
When I load the extension, I get this error:
"Could not find interface: ISourceMod"

Here are the parameters from the sourcemod sources:
#define SMINTERFACE_SOURCEMOD_NAME "ISourceMod"
#define SMINTERFACE_SOURCEMOD_VERSION 14

The sourcemod version, that I have the problem with is:
SourceMod v1.9.0.6260

Does it mean the interface is too old, or to new or it's something else?

Re: Could not find interface: ISourceMod
 

You likely compiled the extension against the master branch, which has a higher ISourceMod interface version. Recompile after switching to the 1.9-dev branch, or upgrade to SM 1.10.x.