PS3HEN multiMAN + ps3netsrv = error 80010002 (EINVAL)

[mdmitry]

Hello, I've replaced HDD on my CFW-incompatible slim PS3, updated it to OFW 4.82, and installed HEN 3.40.

multiMAN mounts PS3 backups from USB successfully, but when trying to load same backups from ps3netsrv I get this error:

This operation is not allowed.

ISO TYPE: 32
ISO PATH (I): [/net_host0/PS3ISO/game.iso]
ISO PATH (O): [/net_host0/PS3ISO/game.iso]
ISO SEGS: 1

ERROR: 80010002 (EINVAL)

Same error on 3 different multiMAN versions: MOD v4.91, Unofficial v04.84 HEN, and v04.82.00 HEN
Tried using ps3netsrv_20250501 and ps3netsrv_20200708

webMAN works perfectly with the same ps3netsrv. Any ideas how I can make multiMAN work too?

Thanks.