Update: Win10PE_SE_2021-04-24 "Images Configuration" now shows both WimInfo and registry info with BuildClass2 when possible. Many improvements and fixes with a huge set of Plugins eg. Audio works out of box Critical Update: Win7PESE, Win8PESE, Win8.1SE Fixed "wimgapi was not found"
Updated Win7PE SE, Win8PE SE, Win8.1SE Win10PE_SE 2021-04-25 Since MS decided to change things again a few days back, a quick update was required. Critical Update: Win7PESE, Win8PESE and Win8.1SE -> "wimgapi was not found" again fixed. If you want to build Win7PESE Win8PESE Win8.1SE better use Win10Host If you want to use another Host: 1) Be sure your source is on a folder and you let "Extracted Wim Folders" Plugin extract the source. 2) Probably better not to use \Drivers\"Driver Integration" Plugin If you see "wimgapi was not found" again in future, manually fix it by putting required files to the appropriate folder, check the log to see the appropriate folder. Win10PESE: So far no problem reported with "wimgapi was not found". Default Win10PESE does not need mount (BuildClass3) But in case you have "wimgapi was not found" failure with Win10PESE in the future, just put required files in the appropriate folder manually, check the log to see the appropriate folder. Technically, Win10PESE default with BuildClass3 does not need wimgapi and relevant files, but [the developer] does not have time to update relevant Plugins accordingly. Probably in the summer.
Sorry I cannot help you there. I haven't used WinPE_SE since Win10XPE was released March 2018. Maybe a member here that uses it might be of help.