Android Question USB-Serial 2.3 with b4a 3.82 problem ?

Hi,
last week I bought b4a 3.82. My old projects with USB-Serial do not work on severel devices.
After init the USB I get following error on the devices ( all with Android > v.4.1x)
: An error has occurred in sub:
java.lang.RuntimeException : Cannot parse: 0 as boolean

and sometimes:
An error has occurred in sub:
java.lang.RuntimeException : Cannot parse: 1 as boolean

What can I do ?

It is possible to get an old Version of usbserial lib ?
Thanks for help , Reimer