I ma y have found a typo that stop the ability of newly downloaded Aceinna extensions from building code.
I have some old code that worked on a previous computer that has been built hundreds of times without a problem. Now with new computer and fresh VS code, fresh platform IO, Aceinna extensions. Trying to build the same code yielded the below error

Processing OpenIMU300RI (platform: aceinna_imu; board: OpenIMU300)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Tool Manager: Installing platformio/toolchain-gccarmnoneeab @ >=1.60301.0,<1.80000.0
UnknownPackageError: Could not find the package with 'platformio/toolchain-gccarmnoneeab @ >=1.60301.0,<1.80000.0' requirements for your system 'windows_amd64'

after hours of digging I was able to find the location where this tool chain was called within


Within platform.json file find on line 25

"toolchain-gccarmnoneeab": {

and replace with

"toolchain-gccarmnoneeabi": {

Note the "i" at the end.

I checked the platform.json file with github
link text
and it appears correct so somehow downloading, I got a bad file

Hope this help someone